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Kentish.-A Treatise on a Box of Instru

mients, And the Slide Rule; with the Theory of Trigonometry and Logarithms, including Practical Geometry, Surveying, Measuring of Timber, Cask and Malt Gauging, Heights, and Distances. By Thomas Kentisu. In one volume, 12mo.

$1 25 Kobell.-Erni.-Mineralogy Simplified:

A short method of Determining and Classifying Minerals, by means of simple Chemical Experiments in the Wet Way. Translated from the last German Edition of F, Von KOBELL, with an Introduction to Blow-pipe Analysis and other additions. By Henri Erni, M. D., Chief Chemist, De. partment of Agriculture, author of "Coal Oil and Petroleum." In one volume, 12mo.

$2 50 CONTENTS.---The Blow-pipe ; Blowing with the Blow-pipe ; Apparatus Requisite for Ordinary Blow-pipe Analysis ; Blow-pipe Reagents Proper; Table of Reactions of Minerals ; Cupellation ; Table of Simple or Elementary Bodies. INTRODUCTION TO VINERALOGY. SYNOPSIS.-I. MINERALS WITH METALLIC LUSTRE. A Fusibility from 1-5, or easily Volatilized; B. Infusible or Fusibility above 5, and do not Volatilize. II. MINERALS WICI DO NOT SHOW METALLIC LUSTRE.-A. B. B. Volatilize eisily or Burn; B. Fuse between 1 and 5, and Volatilize only Partially, or not at all. II. B. B. Alone or Fused with Soda Oro Coal yield no Metallic Globule, and the Mass Remaining does not act on the Magnetic Needle; C. Infusible or Fusibility above 5. I. Table Showing the Deportment of Inorganic Bodies and their Compounds in Previnary Examinations before the Blow-pipe. II. Tuble Sbowing the Deportment of Metallis Oxides with Microcosmic Salt (salt of phosphorus) and Borax before the Blow. pipe. III. Table Exhibiting the Solubility of the more Important Metals in Different Mineral Acids. APPENDIX.-Coal and Asphaltum.

* This volume is the best one on Mineralogy for popular use ever published in the English language, and is invaluable to all Mineralogists, Geologists, Assayers, Che. muists, Miners of Ores, and all others who have occasion to examine Minerals and Mine. ral Lands.

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Loth.The Practical Stair Builder:

A Complete Treatise on the Art of Building Stairs and Hand-Rails, Designed for Carpenters, Builders, and Stair-Builders. Illustrated with Thirty Original Plates. By C. Edward Loru, Professional StairBuilder. One large 4to. volume

$10 00 A thorough understanding of the planning and construction of both the Stairs and the Rails, is obviously necessary to a successful Stair-Builder, and it has been my aim, in preparing this book, to cover the whole ground. In this country, where skilled labor is valuable, especially at the present time of our progressive age, any mechanio, par. ticularly any one connected with Building, is expected to do a neat and substantial piece of work in the shortest time and with the use of the least material possible; to accomplish this, he, particularly the Stair. Builder, must be a good linear draughtsman. Linear Drawing is mostly a practical application of the principles and facts arrived at by the demonstrations in Elementary, Constructive, and Descriptive Geometry ; the necessary Definitions, Theoretas, and Problems of that science are introduced in the forward part of the book in a practical, comprehensive manner, and illustrated on Plates I. to IX.

Plates X. to XXIX. illustrate every conceivable case and form of Stairs and Rails which may coine under the stair.builder's notice.

The frontispiece is a perspective view of the staircase Fig. 1, Pl. XXIX., finished in Gothic style, with wainscoting along the wallstring.

By the system follower in this book, the wreath pieces are all sawed square through the plank, all joints made at once, and the Rail, as also the Stairs, may each be pat together and finished in the shop for an entire story, before being taken to the building

In no case need the thickness of the plank be more than the width of the rail; the instractions given to ascertain the length of odd balusters will be found of service.

The explanation of the Plates is explicit in every particular. That of the practical part of Plates X. to XXIX, is written in such a manner that a very careful study of the theoretical part is not absolutely necessary. From the Author's INTRODUCTION.

Landrin.-A Treatise on Steel:

Comprising its Theory, Metallurgy, Properties, Practical Working, and Use. By M. H. C. Landrin, Jr., Civil Engineer. Translated from the French, with Notes, by A. A. FESQUET, Chemist and Engineer. With an Appendix on the Bessemer and the Martin Processes for Manufacturing Steel, from the Report of Abram S. Hewitt, United States Commissioner to the Universal Exposition, Paris, 1867. In one volume, 12mo. $300 CONTENTS.—JI1STORY OT STEEL.-Discovery of Steel-First Furnaces of the Hebrewsthe Chinese-the Greeks, Homer-Scarcity of Steel-Bronze-Æthalia--the ChalybesFurnaces--Fuel in use-Knowledge of Pit Coal-Knowledge of Pig Iron-Iron and Steel in Egypt and Arabia-First Iron Bedstead-Corporation of Blacksmiths-Ores known at that time--Progress of Iron and Steel-Invention of the Haminer and Anvil--Invention of the Bellows - Manufactures in Palestine-Greek Colonies-- Discovery of Metals--Iron Coins-The Phænicians-Metallurgy in Æthalia-First Alloy of Iron and Bronze-Roman Metallurgists--the Moors of Spain--Ancient Bibilis–Germany-Ores employed thenUse of Fluxes – Blowing Machines---Pig Iron unknown to Agricola – Determination of the time of its use-First Blast Furnace-Blast Furnaces in France-Fluss ofen in India --Cast Iron employed in England-Eastern Countries the Birthplace of Steel-First Cementation of Iron-Sheffield Cutlery-Introduction of Cast Steel in England--Puddled Steel invented in Carinthia-Progress of Steel Works in France.

PRELIMINARY OBSERVATIONS.- IIEAT: Expansion - Fusion – Colorations by HeatUnit of leat. OXYGEN : its affinity for Iron-Metallic Sponge (Chenot's)---Protoxide of Iron (Ferrous Oxide)- Peroxide of Iron (Ferric Oxide) Afinity for Carbon--Reactions of Carbon and Oxygen--Working of the Blast Furnace-Oxidation of Steel. SULPUUR : its action upon Steel--Process for Removing Sulphur from Ores-IIow to avoid it in Fuels Action of Rain and Air. Phosphorus: its Action upon Steel-it Combines with Sulphur. Waten: its importance in Metallurgy—its yield in Oxygen-Steam-its action on Sulphur--its action on Silicon-Decrepitation—its Hygrometric state. LIVE: its action as an Oxide -- its action as a Metal. Iron Ores: inportance of their knowledge their definition--their varieties-How to distinguish them: 2 1. Carbonate of Iron - Lithoid Iron-Spathic Iron-Analyses-Superoxidation

: 2 2. Oligist Iron-its varieties – Ana!yses-Red Hæmatite-its transformation into Red Chalk-its yield— Presence of Manganese : 2 3. Magnetic Iron -- Swedish Irons — Analysis of Pig Metal: $ 4. Hydrated Oxide of Iron-Brown Hämatite-Varieties of this Oro. Fuels: Definition--their importance in Metallurgy-Carbon -Varieties of Fuels--Constituent Principles-Carbon and Ilydrogen-Ashes of Mineral Fuels–Ashes of Vegetable Fuels: 1. Wood-Lignine --Calorific Power-Woods divided into two classes--Comparative Value: & 2. Charcoal-Object of Carbonization Age of the Wood to be felled--Proper time for felling--Methods of Carbonization--Carbonization in heaps-Comparison of the products--Conduct of the operation-Red Charcoal--Rapidity of the Carbonization-Calorific Value of CharcoalsComposition of Charcoal-Density and Weight-Yield in Alkalies: 2.3. Pit Coal-Various kinds of Coal-Certain kinds of Coals naturally distilled-Comparative Composition-Calorific Power-Weights--Yield in Sulphur: 2 4. Coke-Coals good for CarbonizationProcesses of Carbonization--Comparative products in Weights Comparative products in voluines-- Calorific Value --Weights -- Object in Carbonizing - Natural Carbonization. § 5. Anthracite-its qualities—its value-its use.

PART FIRST. STEEL AND ITS Theory.-Definition--Iron-Carbon-Theory of Al. loys--Carbides of Iron-Analyses of Steel-Electricity Solution-Saturation -- Definite Proportions--Reactions in the Blast Furnace--Formation of Pig Metal-Unity in Sted!-Carbon and Iron--Manganese-Carbides of Manganese--Action of Manganese_Mushet's Steel-Silicon--Alloy made by Berzelius-Composition of Steel Cloget's Steel-Magnesium-Aluminium-Virious Alloys--Chemical Alloys-Experiment-Beginning of Comentation--Steely Iron-Cemented Iron-Blistered Steel - Is this a True Steel? --Fusion

-Remediez-Cast Steel-Steel made in Blast Furnaces-Inferences - Manufacturey of Steel in the Alps--Production of Steel in the Pyrenees--Unity in the Theory-Proportion of Carbon. THEORY OF RÉLUMUR: Extracts from Révumur's work--Case HardeningConversion of Iron into Steel-Cementing substances-Nature of these substances--Mode of operation-Trials with Mixtures--Explaining how tho Experiments succeeded-Trial with Lime-Trial with Plaster of Paris--Sand-Change of Texture-Trial with Clay Trial with Leached Ashes-- Trial with Glasz-he metal cleansed-Necessity of Cement. ing substances --Uselessness of Secrets - Trial with Fatty matters - Trial with certain Salts-- Trial with Soap-Trial with Charcoal-Conclusions Researches--Alkalies--Borax-Steel not remaining such-Common Salt-Spirits of Salts---Mineral substancesSalts and Charcoal-Bost Composition (at Réaumur's opoch)--Charcoals.

QUANTITATIVE ANALYSIS.--Composition of Steel--Combined and Uncombined Carbon --Other Metals Alloyed--Pulverizing--Separation into three portions: 1. Estimation of Carbon-Search for Nitrogen: 2. Estimation of Sulphur and Phosphorus: 3. Estimation of Graphitic Carbon, Silica, Lime, etc.-Search for Chrome and Aluniina-Search and estimation of Manganese--Precipitation of the Line-Search for Magnesium.

PART SECOND.-METALLURGY OF STEEL.-Substances for making Steel.--Classifi. cation of the Processes-Division of this Section. NATURAL STEEL: Furnaces---Catalan Forge-Dimensions Production of Steel or Iron--Position of the Tuyere--Projection of the Tuyere-Slope of the Tayere-Dres employed-Charging the Furnace-WorkingDrawing the Blooms-Length and Waste of the operation. RAW STEEL: Pig Metal employed Furnaces–Dimensions--Staff of Workmen-Mode of operation-Products and Consumption - Another Method-Westphalian and Silesian Processes--Products and Consumption-Styrian Process. PUDDLED Steel: Furnace-Pig Metal employed Working - Products, Consumption, Labor. STEEL OF CEMENTATION : Definition-Cementation at the ordinary temperature-Ignorance on this subject-C'emcutation in general--Furnace -Dimensions-Chargem Operation--Observations on Furnaces. CAST STEEL: Object of Casting-Crucibles or Pots---Construction of Pots—Choice of the materials Mixed Clays -Moulds-Drying-Annealing - Various Shapes of Pots — Stands and Lids--Labor Graphite, its composition-Casting Furnaces-Dimensions-Sheffield Furnaces--Charging-Fuel Operation-Making the Ingots--Running into largo Moulds—Use of Manganese-Remarks on Steel. Woorz: Definition-Ore employed-Furnace--Analogy with Natural Steel-Fusion-Waste-Analogy with Cast Steel-Various Processes-Shape of the commercial product. New PROCESSES: Summing up of the various processes Tendency of the Metallurgy of Steel-all processes derived from one principle—Process of Mr. E. Newton-Process of Messrs. Crace Calvert, Fontaine-Process of David Masbet and S. Rodgers--Process of Messrs. Martien and Brooman--Process of Mr. Robert MuchetProcess of Messrs. Price and Nicholson-Process of Mr. Manory--Process of Mr. Sterling -First idea of the Bessemer Process due to Mr. Martien. Chenot Process: Principlerational idea-Mr. Chenot is struck by it-Disposition of the Apparatus-Enormous Conpression-Cementation-New Metallurgy of Steel. Bessemer Process: Theory-First idea due to Mr. Martien-Principle of the Operation - Apparatus-Fitting the ConverterMode of operation. Taylor Process: Analogy with the Beszemer Process-ApparatusProduction regulated at will-Continuous Production. Uchatiu Process: Definition-Pig Iron employed-Granulating the Metal-Theory--Mode of Operation-Proportions Experiments-Products and Consumption. DanasCUS STEEL: Damascus Blades-Price and description of Seimetars-Imitations in Europe How to make the Pattern appearTheory of Mr. Henri, of Bougeval--Influence of Aluminium. METALLIC Tissues: Definition -Metallic Aloys-Silver Steel --Mechanical Alloy-Rhodium Steel-Platinum Steel Metallic Mirrors--Chromiunn Steel.

PART THIRD-WORKING OF STEEL.--Division of this section. REFINING BY DRAWING OR TILTING : The Object of this Operation--Working-Furnace-Influence of a good Workman. WELDING: Temperature-Equilibrium of Heat-Respective Masses of Iron and Steel-Use of Borax. ANNEALING: Annealing is not Tempering--Diference-Degree of Temperature--Cooling in Water--Cooling in Charcoal Dust. JIANDENING: Effects from Heat-Slow Cooling-Rapid Cooling-Explanation of the Hardening-DefinitionLoss of Specific Gravity-Hardening in Tepid Water-Theorem on Hardering-Limits Cherry-red Heat-Pure Water-Degrees of Hardening-Temperatures for HardeningOverheating Employment of Fusiblo Alloys--Composition of these Alloys. TEMPERING: Harshness of Steel-Structure of Iron and Steel-Change by leat-Tilted Steel-Tempering-Effect produced-Changes of Color in Tempering-they act as Guides-Mode of Operation and Precepts. HAMMER HARDENING: Hammering Iron-hunmer Hardening Steel-should not be done too rapidly-Warped or Distorted Pieces-Causes of this phe nuinenon.

PART FCURTH. - PROPERTIES OF STEEL AND ITS USES. - Contents of this Section, CHARACTERISTICS OF STEEL: Distinction of Acids--Specific Gravity-Granular TextureCrystallint Texture Fiurous Tex:urt-Harduess-- Differences by Scratching-Substances

for Scratching-Sound of Steel-Fibre of Steel-Welding-Forging-Harshness--Hard. noss to the Filem Differences of Texture-llow to make ihe Trial---Curious phenomenon -What Diodorus and Plutarch relate-Sheffield Cutlerz-Mr. Weiss, of London-Tensile Strength-Wheel Tires-Iron Tires-Puddled Steel Tires---Comparative Resistance to Wear--Iron Tires.-Puddled Steel Tires-Cast Steel Tires-Runs performed-lorse. Bhoes-English Manufactures-Trade Marks-Swedish Irons-Russian Irons. Files: Materials for Files-Forging-Hand Forge--Annealing-Truing the Blanks-Grinding -Cutting-Cutting Machines---Hardening -- Furnace-Mutiles --Why Mufiles are employed---Coatiny-Heating--Colors-Conditions of Success-Number of Men emploved to the Furnace-Mode of Immersion-Warpiny-Straightening-French Files How to File-Files employed('olor of the File-Trial of Files-Rejected Files-Sone Defects in Files-Trial of Bastard Files-- Trial of Sponth Files. STEEL WIRE : Drawing Wire -its object-Draw Plates-what made of the Conditions they have to fulfil-Pointing and Drawing the Wire--Effect of a Coating of Copper-How many Annealings- Slow Drawing necessary-Oxidation-Annealing Furnace-Furnace of Aigle-Furnace of Mr. Fox-Working of this apparatus-mits advantages-Qualities of Steel Wire-GaugesPrinciple of Wire Drawing-Pinion and Grooved Wires-Watch Springs --Wires for Musical Instruments. NEEDLES: Choice of the Wire-Length-Pointing--SeparationHead Flattening-Innealing-Making the Groove-Stamping tho Heads-Straighteniing-Inspection-Hardening-Tempering-Polishing-Scouring-Winnowing and Wiping--Loss by the operation--Sorting the Needles--Drilling of the Eyes Last Polishing and BurnishingCemented Needles---Gilt Needles. STEEL PLATE: Choice of the Metal - Procossos of Drairing-Steel of ('ementation-Slabs-Ilammers-Steam HammerRules for Heating Furnaces - Doubled Slabs -- Construction and Material of Rolls Roughing down Rolls-Train of Rolls-Protection of Slabs-Taking the Oxide off Plates -Tardening-Namber of Revolutions of the Rolls-Engraving Plates_Error on this subject. Saws: Materials-Slahs-Punching the Teeth--Shapes of Teeth-Ileating-Hardening-Blazing off--Straightening---Planishing-Hammering and Polishing. Tarkin.-The Practical Brass and Iron

Founder's Guide; A Concise Treatise on Brass Founding, Moulding, the Metals and their Alloys, etc.; to which are added Recent Improvements in the Manufacture of Iron, Steel by the Bessemer Process, etc. etc. By James Larkin, late Conductor of the Brass Foundry Department in Reany, Neafic & Co.'s Penn Works, Philadelphia. Fifth edition, revised, with Extensive additions. In one volume, 12mo.

CONTENTS :-On the Properties of Metals. On Metallic Alloys. Table of Metals. Conducting Powers of Metais. Table of Experimental Results as to some of the Chemi: <al and Physical Properties of the Atomic Alloys of Copper and Zinc, and of Copper and Tin. On Founding On Brass Founding. Copper. On the Reduction of Copper. Tin. On the Reduction of Tin. Grain and Block Tin. On Zine. On Lead. On Antimony. Order and Working of Metals.

On Copper and Tin. Bronze for Cannon, Statues, etc. On Bell Metal. On Copper and Tin Mixtures. Alloys of Copper and Vinc. Alloys of Copper, Zinc, Tin, and Lead, Manheim Gold. Pinchbeck. Princess Metal. Tombac. Artificial Gold. Fine Brazing Solder. Remarks. Facing. Metallic Moulds. Pewtering. Complex Objects. On Beli Founding. On Guu Founding. On Figure Casting. Brass Mirrory. Copper. Metals. Surface of Metals. Blanched Copper. British Weapons and Tools in Bronze, anciently called Corinthian and Syracuse Brass. On Brass. Casting in Plaster. To Transier Engravings to Plaster Casts. To Varnish Piaster Casts. To Cast Concave or Convex Molds of Metals un Tin Foil, with Plaster. To Cast Vegetables, Insects, Small Birds, Frogs, Fish, etc., in Plaster Moulds. To Prepare & Medal for the above. Sir Isaac Newton's Fusible Metal. Rose's Alloy. Dr. Dalton's Fusible Alloy. To Cast in Wax. To Cast in Sul. pliur. To Cast in Glue. To make a Fine Glue, wherewith you may oast curious Medals. To Cast in Bread Paste. To cast Figures in Imitation of Ivory. Rice Glue Statuary. A Composition for Ornaments. Alloys, Amalgams, etc. Native Alloys. Density of Metals. Bronze, Bell, and Speculum Metals. Combination and Chemical Action. Yel. low Brass. To make Copper Medals and Medallions. Ainalganation of Metals. Bis. muih. On Friction. On Bells. On Fluxes. Fusing and Melting Points. Fluidity. Anti-Friction Metals. Table for Converting Decimal Proportions into Division of the Pound Avoirdupois. Keller's Statue Composition. The Chinese Packforg. Copper.

$2 25

Silver Steel. Copper and Antimony. Antimony anul Tin, Copper and Bismuth. Bis. muth and Lead Full Measure of Capricity of Tin and Lead. Brilliants of Fahlum. Qneen's Metal. Tin and Zino. Tin and Iron. To Silver copper. Mosaic gold. To bronze brass, etc. Lacquers. Green Bronze Liquid. To Silver ivory. 'Zincing. Metal Plateg. Cast Metal Bells. Cast Iron Pipes. Cast Metal Cylinders. Specific Gravity and Weights of Materials. Specific Cohesion and Strength of Metals. Direct Cohesion of Metals. Resistance of Metals to Pressure. Resistance of Metals to Torsion. Gold and Silver Solder. Brass Solder. Methon of Soldering Gold and Silver, To Cleanse Silver after it is Soldered. Silver Solder for Jewellers. Trinket Composition. Silver Plnte and Medal Alloy. Gold Coin of America Alloy, solder for Iron. Soldering and Burning Metals. Plumber's Solder. Compositions of Pewter. White Metal. Mosaic Mixture. Silvery Looking Metal. Metal for Flute Valve keys. German Titanium. Spanish Titanium Britannia Metal Columbia Metal Type Metal. Ger. man Silver. Speculum Metal. Remarkı. Platina. On the Properties of Arsenie. Fontainemoreau's New Alloys of Zinc, a substitute for Bronze, Copper, and Brass. 0:2 Zinc as a Protective Covering for Iron; and the Adaptation of the Process of Electrodeposition for tbnt Purpose. Water in Pipes On Crucibles. Plumbago. Hardening Steel. On Boron. On Sulphur. Selenium. On Chlorine. Metallic Oxides.

APPENDIX:--To Brown Gun Barrels. Varnish for Gun Barrels that have undergone the Process of Browning. Ethereal Solution of Gold. To Cont Sinall Nails, etc. with Tin. Bronzing Electrotype Custs-Chemical Bronze. Black Lead Bronze. Carbonate of Iron Bronze. To 'I in Iron. Liquid Glue. Artificial Fire Clay. A Cement which resists the action of Fire and Water. Cement for the Joints of Cast Iron Ni. ello-Metallic Ornaments. Tracing Paper. To Fix Drawings. Antidote to Arsenic. To soften Ivory. To separate the Metallic Portion from Gold and Silver Lace. Blue. ing and Gilding Steel. To Harden Steel Dies. Portable Glue. Prevention of Corro. sion. Cement Soluble Glass. Japanning. To Preserve Polished Steel from Rust. Cement for Attaching Metal to Glass. Varnish for Colored Drawings. Japanners' Copal Varnish, Soft Varnish. Hard Varnish. Flexible Varnish. French Polish. Brunswick Black. Mordant Varnish. Another. Another, Another. Another Su. perior Green Transparent Varnish. Etching Varnish.

SUPPLEMENT :-On Pattern Making-Contraction of Metals, etc. Conducting Heat of Brass and Iron. Varieties of Tombac. On Sand Core Moulding, Blackening, etc. On Washing Sweepings, Ashes, etc., from Brass Foundry Furnaces. Gilders' and Jew elers' Workshops, and Places where Metallurgic Operations are carried 'on. Cornish Refining Flux. Crude or White Flux. Black Flux. Cornish Relucing Flux. Imi tation Silver Metal. On Case hardening Iron. Varnish for Iron. Varnish for Polished Iron. To preserve Gum Arabic Solutions. Best Composition of Brass for Rolling and Forging. Remarks on the Fluxing of Metals. Tinning Cart Copper or Brass. Table of Experiments on the Tenacity of Metals. On Reducing Copper with White Argenic. Tin and Zine. Tin and Iron. Copper, Tin, and Iron Alloy.

Corinthian Bronze. Syracuse Bronze. Ship Nails, Composition, strong and durable. Chinese White Metals. Fenton's Anti-friction Metal. To make Wbite Lacquer. On Iron, and some Improvements in its Manufacture. Table of Com. parative Strength of Cast Iron Table of Comparative Strength of Wrought Iron. On the Strength of materials-by C. A. Lee, C. E Table of Strength of Materials. Op the Strength of Iron-Cast Iron. Composition for Silvering Brass. Steel by the Besse. mer Process - by A. L. llolly. To Silver Brass. Resistanee to Compression. Table from Mr. Hodgkinson's Experiments. Static Pressure of Water under different Heads. Directions for Preparation and Fitting of Babhit's Anti-nttrition Metal. Soldering Flaid for Soft Solder. Alloy of the Stanılard Measure used by Government. Tutenng. Expansion Metal.

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Leavitt.-Facts about Peat as an Article

of Fuel: With Remarks upon its Origin and Composition, the Localities in which it is found, the Methods of Preparation and Manufacture, and the various Uses to which it is applicable; together with many other matters of Practical and Scientific Interest. To which is added a chapter on the Utilization of Coal Dust with Peat for the Production of an Excellent Fuel at Moderate Cost, specially adapted for Steam Service. By T. H. LEAVITT. Third edition. 12mo.

$175

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