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D-slide. Short D-slide. Locomotive slide. Seaward's slides. Cylindrical slides, Cushioning. Lead of slide. Lap of slide. Effect of lap. Working with and without lap contrasted. The eccentric. Throw of eccentric. Stops on the eccentric. To find the travel of the slide. Double-eccentric. Throttle-valve. pansion-valve. Expansion valves. Hornblower's valve. Cornish double-beat. Equilibrium-valve. Valves of II. M. S. Penelope. Grilliron-valves. Other kinds of expansion-valves. Maudslay and Field's rotary expansion-valves. Condenser-gauge. Pressure in condenser by gauge. Errors in barometer-gauge. Mode of correcting ditto. Lubricators. Expansion-cains and gear. Feed.pumps. Bilge-pumps. Modes of propulsion. Paddle-wheels. Feathering-padilles. Reefing the paddles. Disconnecting the wheels. Methods of disconnect. ing paddle-wheels. Immersion of paddle-wheels. Paddle-wheel brakes. The screwpropeller. Definition-length of screw. Definition-angle of sorew. Pitch of screw. Slip of screw. Area of screw. Tbread of screw. Diameter of screw. Disconnecting the screw, Methods of raising the screw. Governors in screw-ships.

CHAPTER IV.--Direct-action engines, Gorgon engines. Length of radius-bar of ditto. Fairbairn's engines. Maudslay's double-cylinder engines. Boulton and Watt's direct engines. Messrs. Miller and Ravenhill's direct engines. Oscillating engines. Engines for working the screw-propeller, Direct-acting screw.engines. Direct-acting geared-engines. Oscillating horizontal engines. Trunk engines. Double-acting airpuinp. Maudsiay and Field's return connecting rod engine. Humphrey's engine.

CHAPTER V.-GETTING UP THE STEAM:~Filling the boilers. To know when the blow-out cocks are closed. On the proper height of water in the boilers when fires are first lighted. Laying the fires. To get up the steam expeditiously. Duties to engines,

while the steain is getting up. Injection-orifice choked up. To see the engine clear for starting. Foot-valve gngged. Starting the engines. Starting with one engine in gear. Working engines at moorings. On starting from moorings before the steam is well up. Steaming through an intricate passage on first starting. On opening the communication between a hot and cold boiler. Priming on first starting the engines. On priming while getting up the steam. Remedies against priming. Chilling effects of cold surfaces. Banking up the fires. Putting back the fires. Safety-valves to be closed when bunking up. On the steam gauges of strange boilers. Attention to the jackets of steam-cylinders. To ascertain it blow-out cocks are opened.

CHAPTER VI.-DUTIES TO MACHINERY WHEN UNDER STEAM:The boiler. Glass water-gauge. Blowing out. On the limit of saturation. The salinometer. Ash-pits to be kept clear of ashes. On stoking. Management of fires. Feeding the boilers. To prevent saturation of boilers under peculiar circumstances. Decrease in maximum boiler-pressure when the ship is rolling. Blowing-out to be limited at times. On the nuinber of boilers to be employed. Superheating apparatus. Ashes escaping from the funnel. Flawe appearing at the top of the funnel. On the supply of air to the fires. To prevent accidents if the water be low in the boilers. Effect on the steain from ad. initting a large supply of cold water. Attention to be paid to injection-pipes. Kings. ton's valves. Working as high-pressure engines. Injecting from the bilge. On leaks in the engines. Method of working engines with leaky slides. Leaky condensers or air-pumps. Attention to be paid to feed. pumps. Attention to be paid to dampers and ash-pit doors. Back-lash. Duties to bearings of engines. Soft metal for bearings. Expansire working. Steam-circle. Management of fuel. Previous notice to be given before stopping the engines.

CHAPTER VII.-Duties to MACHINERY DURING AN ACTION, OR APTER AN ACCIDENT ;-Gear for repairing damages during an action. Machinery to be examined before an action. Precautions against fire. Regulation of fires during an action. Casualties to paddle-wheels during an action. Effect of shot upon funnels. Remedies proposed if shot enter the boiler. Regulation of the steam during an action. 'Temporary repairs to a boiler. Temporary repairs of a steam-pipe or a feed-pipe. Method of working one engine. Remarks on screw propeller. To clear the bilge of a vessel. Precautions in case a vessel be run ashore. Temporary repair of boiler tubes. Steamers in chase. To repair the funnel after an action. To straighten a bent piston rod. To work engines without cylinder.covers.

CHAPTER VIII.- DUTIES TO ENGINE, ETC., OX ARRIVING IN HARBOR :- Blowing out the water. Hauling out fires. Duties to engines on arriving in port. Lubriontors to be examined. Bearings to be examinca. Remarks on the outer bearings of paddle. chafts. , Remarks on piston.glands, keys, etc. On screwing down the "holding down bolts.: On examining, repacking, etc., slides. To find the length of stroke of an engine. To adjust the parallel motion of engines. To adjust paddle-shafts. To set slides. To adjust eccentric-rod. Remarks on alteration of the slides. On cleaning out and scaling the boiler. Rust-joints. On stopping cracks in boilers, etc. On repairing the fire-bridges and ash-pits. On staying the boilers. On increasing the load in the Bilety-valve. Boiler water-glass. On the internal feed-pipe. The steam-gauge to be «x.

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amined occasionally. On replacing the fire-bars. On sweeping the funnel. Coal-bunkers to be exanine. Coaling ship. Rubbisn to be carefully removed after repairs. Dan. ger from impure air in boilers. Screw gearing in screw-steamers. Lubricating the gearing of screw-vessels. Paddles. Preserving boilers when not in use. On fitting mud. hole lours. On getting up steam at frequent intervals. On turning round the wheels by hand. On turning the engines of screw-vessels. Raising cylinder-covers by tackles. To get a cylinder-cover into its place. To ascertain if the piston be steamtight. Piston loose on the rod. Method of separating parts of an engine when rusted together. To blow-through when a blow-valve is not fitted. Process of blowing through, etc., delayed by cold. Attention to engines of screw-ressels.

CHAPTER IX - MISCELLANEOUS :- Measure of efficiency of engines. Duty of an engine. Horse power of an engine. Nominal horse-power. llorse-power from the evaporation, etc. On the screws of steam-ressels. Approximate area of a screw-blade. To find the angle of a screw-blade. To find the pitch of a screw-blade. Requisite pitch for a given speed of a serew. To find the pitch from the speed of ship and the slip. Area of screw.blade (accurately). Power exerted by a screw, Slip of the serew. Best speed in a tide-way. Motion of puddle-steamers in still water. Consumption of fuel in a given time On the consumption of fuel between two ports. On reefing pad. dles. Mensure of performance of engines. On the motion of the crank. Work developed by a crank in one revolution. Length of radius-bar. Amount of work in one stroke of air-pump. Amount of fuel lost hy blowing.out. Best temperature of a con. denser. On the qualities of fuel. Weight of coal when used as fuel. Patent fuel. Effect of stowage on coals. Decay of coals. Qualities of coals suited to navigation. Table 1.-Power and duty, etc., of various coals. Table 11.- Mean composition of average samples of various coals. Tuble III.-Average value of coals from different localities. Table IV.-Average composition of coals from different localities.

APPENDIX --To find the circumference of a circle. To find the area of a circle. To find the surface of a cylinder. To find the volume of a cylinder. To find the surface of a sphere. To find the volume of a sphere. To find the volume of a cone. Circular inch and square inch. To find the area of an ellipse. To find the circumference of an ellipse. Definition of frustum of a cone. To find the volume of a frustum. To find the weight of any substance. Useful rules to be observed when coaling. Table A Pressures of steam, and the corresponding temperatures and relative voluines. Table B-General effects of hent according to certain temperatures. Tahle C.-Of the linear expansion of solid bodies by heat. Bxpansion of fluids by heat. Table D. Table E. Tohle F.-Of capacities of bodies for heat referred to water as the standard. Table G. - Mechanical properties of Materials. Table H.-Circumferences and areas of cireles of given diameters. Table I.--To find the pitch of a screw from the angle and diame. ter. Table K.-Knot table. Screw-steamers in her Majesty's Navy. Paddle-steamers in her Majesty's Nary. List of steam gun-boats in the Royal Navy.

ALPHABETICAL Index.

Mortimer.-The Pyrotechnist's Compa

nion: Or a Familiar System of Recreative Fireworks. "By G. W, MORTIMER. Illustrated 12mo. CONTexts.— Introduction. Of Gunpowder ; Materials ; Division of Fireworks ; Single Fireworks; Rockets; Tables of various Compositions ; Compound Fireworks.

Martin.-Screw-Cutting Tables, for the

Use of Mechanical Engineers :
Showing the Proper Arrangement of Wheels for Cutting the Threads of
Screws of any required Pitch; with a Table for Making the Universal
Gas Pipe Thread and Taps. Ly W. A. MARTIN, Engineer. Syo.

.50

Miles.-A Plain Treatise on Horse-Shoe

ing.
With Illustrations. By Wm. Miles, author of the “ Horse's Foot”

Molesworth.-Pocket-Book of Useful For

mulae and Memoranda for Civil and Mechanical Engineers. By GUILFORD L. MOLESWORTII, Member of the Institution of Civil Engi. neers, Chief Resident Engineer of the Ceylon Railway. Second American, from the Tenth London Edition. In one volume, full bound in pocketbook form

$2.00 Contexts.--Soale for plans deposited under standing orders; Chain surreying; Inaccessible poinis; Marine surveying ; Levelling with thermometer ; Levelling with mountain barometer ; Formulæ for setting out railway curves; Table for tangential angles för 1 chain chords; Rails for curves; Approximate rale for bending rails; Eleva. tion of outer rail on curves; Anotber rule; Rules for the versed sines and ordinates of curves; Formulæ for constructing tables of earthwork; For both slopes; For central part; Pristnoidal formula ; Earthwork-Angles of slopes ; Natural slopes of earths, with horizontal line ; Earthwork; Blasting; Weight of earths, rocks, etc.; Retaining walls; Reservoir dams; Masonry dams: Brickwork, Mortar, cement, etc.; Plastering; Table of culverts for railways ; Asphalte flooring ; Approximate rules for thickness of arenes; Large arches; Rules sometimes used for railway bridges; Loads on railway bridges; Permanent loads on bridges, etc.; Safe load in structures, including weight of structure; Rolative strength of beams or girders; To cut the best beam from a log; Strength of rectangular heains, supported at both ends; Strength of cylindrical beams, supporteil at both ends; Continuity of girders; Cast-iron girders; Breaking weight of cast-iron girders; Wrought-iron girders; Bowstring bridges; Cast iron arches; Lattice bridges; Approximate rule for the strength of iron struts; Warren's girder ; Weight of Warren's girders; Suspension bridges; American truss bridge; Tunnels, from actual practico in briek-work; Load on roofs, exelusive of framing; slates--Table of sizes and weights of slates, exelusive of laths; Anglos of roofs; Corrugated iron roofing; Strength of columns; Lung columns; Relative strength of materials in long columns; Strength o. short columns; Wooden pillars; Approximate rule for the dimensions of wooden pillars; Approximate rule for the strength of rectangular pillars of wood; Wooden roofs; Scantlings of Purling and rafters; Fire-proof floors, French system, with wrought-iron rolled beams; Strength rolled iron beans; Table of wooden flooring, joists, etc.; Pro. portion of steps in staircases ; Strains on roofs; Rule for strains on iron roofs ; Computation of strains on roofs hy construction ; Thickness of walls of buildings; Warehouses; Pile driving; Sheet piling : Ringing engines.

Railways. Regulations for construction of Prussian railways and rolling stock; Railway; Level crossings and stations ; Locomotive sheds ; Carriage sheds; Locomo. lives; Carringes and wilgons; Memoranda on English railways; Parliamentary regulations for ruilways crossing ronds, Limits of Deviation ; Deviations of level; Devintions of gradient; Deviations of curve, Gauge of railways; Rules for weight of rails; Memo. randa on rails, etc.; Points and crossing: Table of gradients; Resistance of trains; Tractive power of locomotives ; Effective pressure of steam on piston; Rule to find the load which an Engine will take on a given incline; Adhesive power of locomotives; Distribution of weight in locomotives ; Working expenses of railways ; Rolling stock ; Roads; Traction on ronds; Tractive force for horses; Paved roads; Canals ; Maxiinuin power of a horse on canals at different speeds ; Navigable rivers, Obstructions in rivers; T:ible of rise of water occasioned by obstructions; Docks ; Pressure of Luck gates, etc. ; Iron piles for retaining walls; Pressure on Sluices.

WATERWORKS. -Rain-fall; Cast-iron pipes--Pressure in ; Rule for finding the weight of cast iron pipes: Pumping engines; To find the Diameter of a single acting pump; Useful numbers for pumps ; Filters for waterworks; Delivery of water in pipes ; Hawksley's formuln for the delivery of water in pipes ; Discharge of water from orifices, sluices, etc.; Gauging water; Scour of watercourse beds.

Sewens.-Plow of water in sewers; Egg-shaped sewers; Internal dimensions; Pro. portions of oval sewers ; To deterinine the thickness of brickwork.

GAS WORKS, ETC.-Motion of gas in pipes; Service for lamps; Dimensions of mains, with weighis of one length; Purifiers; Products of coal; Drainage of lands; Ventilation; Warming by steam; Warming by hot water; Light; Decomposition of light; Sound; Heat; Thermometer; Comparative scale of English and French thermometers; Specific gravity; To find centre of gravity ; Centre of percussion-Distance from centre of motion ; Centre of gyration; Centrifugal force; Vibrations of the pendulum ; Grarity; Table of velocity of falling bodies; Falling bodies-Velocities due to different heights; Mechanical powers ; Millwork; Strength of teeth of wheels; Proportions of teeth of wheels; Construction of the teeth of wheels; Epicycloidal teeth ; Nature of curves of teeth; Teeth of wheels; Toothed wheels-Rules for the diameter and pitch ; Table of multipliers; Diagram showing method of forming epicycloidal teeth ; To delineate the required curves by construction; Pitches of equivalent strength for the teeth of wheels in different materials; Shafting; Relative powers of metals to resist torsion ; Relative powers of different sections to resist torsion ; Strength of shafting to resist torsion; Supports for ordinary shafting; Strength of slasting to resist lateral stress; Table of shifting - Necks and couplings; Pulleys; Leather belting: High speed belting; Pedestals, or plummer blocks; Steps, or braces of plummer blocks; Coefficients of friction in axles ; Friction of plane surfaces; Rule for finding the weight of castings or forgings by the weight of their patterns; Table of hexagon nuts and bolt-heads; Screws --Table of Wbitworth's screws; Dimensions of eyes of wheels and pulleys (staked); Shrinkage of castings; Alloys; Flukes for soldering or welding.

WORKSHOP RECIPES, ETC. --Antifriction grease; Foundry recipes ; Parting sand; Loam; Blackening for moulds; Blackwash; Mixture for welding steel; Tempering steel; Brazing; Rust joint cement (quickly setting); Rust joint (slowly setting); Red lead cement for face joints; Casehardening; Casehardening with prussiate of potash; Casebardening mixtures; Glue to resist moisture ; Marine glue; Glue cement to resist moisture; Dubbing; Cement for cloth or leather; Iron lacquer; Brass lacquer ; Temperature and volume of saturated steam; Frenchimetre reduced to English inches; Expansion of steam; Mercurial gange; Table of steam used expansively ; Terminal pressure ; Surface condensation ; Combined steam ; Boilers ; General memoranda ; Relative value of heating surface; Boilers-Land; Mountings for a nominal 30-AP boiler; Proportions of cocks; Rules for heating and grate surfaces; Table of dimensions of cylindrical boilers; Area of chimneys; General rules for brick chimneys; Steamboat funnels; Tubular boilers; Marine boilers ; Strength of boilers; Strength of cylindrical boilers; Staying boilers; Staying locomotive boilers; For top stays for locomotive fire-boxes; Giffard's injector ; Riveting for boilers; Bridge riveting; FuelAverage evaporative power; Animal power; Indicated horse-power of engines; Admiralty rule for borse-power; Admiralty nominal velocity of piston for paddle-wheel engines; Admiralty knot; Ordinary rules for nominal horse-power ; Duty of engines ; Lip and lead of the slide valve ; Nominal horse-power of high-pressure engines; Dimensions of stationary condensing engices ; Dimensions of marine side-lever engines; Table of direct-acting screw engines: Safety-valves; Proportions of safety-valve, levers, etc.; General rules for engines; Friction of engines unloaded; Steam-engine Governor; Parallel motion ; To find the versed sine of the are described by the beam of an engine ; Approximate rules for the proportions of stationary condensing engines ; Condensing water; Feed water; Cold water and feed pumps ; Proportion of engine beams; Rule for the sectional area of the beam at centre; Weight of rim of iy wheel; Approximate rules for the proportions of side lever marine engines (low pressure); Approximate rules for the proportions of locomotives ; Proportions of locomotives heating and grate surfaces; Surface of tubes ; Thickness of metal in cylinders ; Dimensions of locomo. tives; Rule for the lap and lead of locomotive slide ; Rule for the strength of locomotive springs; Rule for the centre of gravity of locomotives ; Railway carriages; Ordinary narrow gauge wagons.

Water POWER, ETC. - Memoranda connected with water; Time employed in filling and einptying cisterns when the supply and consumption are going on at the same time; Time required for a cistern with vertical sides to empty itself, the water flowing from an orifice in the bottom; Theoretical velocity due to different heads of water; Table of theoretical velocities of water flowing from orifices ; Undershot water wheel; Poncelet's undershot water-wheel; Floating mill-wheels; Effective power of Poating inills; Breast and overshot wheels; Velocity of Periphery ; Distance of buckets apart; Openings of Buckets; Approximate rule for the number of Buckets; Forms of buckets ; Three part buekets; Gudgeons of water-wheels; Forms of buckets (curved); Overshot and breast wheels; Fairbairn's ventilating buckets; Turbines-Jonval's low-pressure; Diagrams illustrative of Jonval's turbine ; Construction of buckets; Buckets ; Guides; Table of low-pressure turbines, from actual practice; Diameter of upright shaft; Highpressure turbines-Fourneyron's ; Construction of buckets and guides ; High-pressure turbines; Thickness of metal in wrought-iron supply pipes; Hydraulic ram; Water.

pressure engines; Power of pressure engines; Force of the wind; To find the force of the wind; Wind pills--Rule for the angles of the sails; Ordinary dimensions of wind. mill sails; Horse-power and sail area windmills ; Approximate rules for speed of paddle steam-ships ; Diameter of paddle wheels; Area of floats; Immersion of floats; Slip of paddle wheels; Proportions of paddle steam-ships; Screw propellers; Rule for the speed of screws; Approximate rule for the speed of screw steam-ships ; Proportion of screw propellers; Pitch of screw; For two-bladed screws; Tonnage of vessels; Blowing engines; Centrifugal fans; Proportions of fans; Power required for fans; Centrifugal pumps (Appold's); Size of pipes of centrifugal pumps; Dynamometer; Iron-works (in Wales); Power required for different purposes ; Dimensions of blast furnaces; Rule for change wheels in screw-cutting lathes; Power required to punch boiler plates; Dredg. ing machines ; Corn mills; Wood-working machinery; Depreciation of machinery; Mining machinery'; Wirding engines; Cranes ;' Power gained by blocks; Computation of the strains on a crane by construction ; Jots of water under pressure; Weights and measures; Sizes of Drawing paper; Measures of timber; Timber Measuring ; Decimal equivalents of inches, feet, and yards; Decimal equivalents of lbs., qrs., and cwt.; Decimal equivalents of pence and shillings; French decimal system; Comparative scale of English and French weights and measures; Foreign money, weights and measures, compared with English; Logarithm of numbers from 0 to 1000; Properties of triangles; Trigonometrical expressions; Trigonometrical equivalents; Natural sines, &c.; Logn. rithmic sines, &c.; Ellipse; To construct an ellipse by ordinates; To calculate any ordinate; Properties of the circle ; Segment of circle ; Parabola; Construction of parabolic curve; Cycloidal curve; Construction of the cycloidal curve; Mensuration of surfaces ; Seginent areas; Mensuration of solids ; Table of polygons ; Table of polyhedrons ; Areas of circles ; Circumferences of circles; Properties of metals; Strengih of iron; Tenacity of wrought iron ; Timber; Miscellaneous; Fluids ; Gases; Artificial substances ; Stones, eartbs, ete.; Modulus of elasticity ; Weight and strength of round ropes of hemp and wire ; Weight and strength of tat ropes of hemp and wire; Weight and strength of liemp rope ; Rule for the weight of pipes ; Weight of pipes; Birmingham wire gauge, compared with inches; Weight of a lineal foot of flat bar iron ; Weight of a lineal foot of round and square bar iron; Weight of nuts and bolt-heads; Weight of a square foot of sheet metals; Weight of a superficial foot of plates, different metals; Weight of cast-iron balls and solid cylinders ; Weight of ordinary angle iron ; Strength and weight of chains; Numbers raised to the 3.6th and to the 1.7th powers; Squares, cubes, square roots, and cube roots; Table of the fourth and fifth powers of nuinhers; Reciprocals of numbers; Links reduced to feet and decimals; Wrought-iron girders; Gauging the Metalling; Board of trade regulations for railways; Force of water; Salé load on chains; Giffard's injector ; Joule's mechanical equivnlent of heat; Rules for the elastic force of steam; Measurement of heights; Railway sidings; Decimal equivalents of a degree; Decimal equivalents of pounds and ounces; Decimal equivalents of the divisions of a foot; Sizes and weights of sheet tin; Useful numbers for rapid approximation ; Weights, measures, etc.; Weight of metals; Wrought-iron ; Various metals; Rainfall; Speed of trains ; Steam-ships ; Useful numbers for pumps ; Useful memoranda connected with water; Useful numbers for weight of pipes; Standard water pipes: Hydraulic press; Brickwork; Hoop iron; Railway curves ; Relative value of useful angles to angle of intersection; Setting out with two Theodolites.

SUPPLEMENT.-By J. T. Hurst, C. E.--Railway curves; Table of Tangential angles for chords of 1 foot to 100 feet; Measurement of earthwork; Mining ; Approximate rules and tables for the thickness of arches and abutments; Table of the thickness required for the crowns of arches; Table of the minimum thickness of abutments for bridge and similar arches; Cast-iron columns; Hollow columns; Flow of water through pipes and conduits ; Cylindrical pipes; Egg-shaped sewers ; Table of the power required to raise water from deep wells; Gas; Tables of the supply of gas through pipes; Rules for the stiffness of beams; Triangles ; Casks; To measure heights with the sextant; To find the distance in feet when the angle subtended by 1 foot at that distance is known; Table showing the quantity of mortar produced by one imperial bushel of various limes and cements; Table of the properties of saturated steam; Hyperbolia logarithms; Table of knots and statute miles; Tablo of admiralty knots and statuto miles; Index.

Moore.--The Inventor's Guide:

Patent Office and Patent Laws; or a Guide to Inventors, and a Book of Reference for Judges, Lawyers, Magistrates, and others.

By J. G. MOORs. 12mo., cloth

$123

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