colours produced by angular glass, mentioned by Seneca, about First treatise on, by Euclid, about The magnifying power of convex glasses and concave mirrors, and the prismatic Hints for spectacles and telescopes given by Roger Bacon, about Spectacles (said to be) invented by Salvinus Armatus, of Pisa, before Camera obscura said to have been invented by Baptista Porta 1711 1725 1772 1783 1824 B.C. 424 B.C. 300 B.C. 280 50 120 1108 1280 1300 1560 1571 Telescope made by Jansen (who is said also to have invented the microscope), about 1609 [The same instrument constructed by Galileo, without using the production of Jansen.] Astronomical telescope suggested by Kepler Microscope, according to Huygens, invented by Dr. Drebbel, about [Jansen and Galileo have also been stated to be the inventors.] 1611 1621 Cassegrainian reflector Law of refraction discovered by Snellius, about Newton 1624 Reflecting telescope, James Gregory Motion and velocity of light, Roemer, and after him Cassini (velocity 190,000,000 miles in sixteen minutes) about 1663 1666 1667 Double refraction explained by Bartholinus 1669 Newton's discoveries 1674 Telescopes with a single lens, by Tschirnhausen, about 1690 Polarization of light, Huygens, about 1692 Structure of the eye explained by Petit, about 1700 Achromatic telescope constructed by Mr. Hall (but not made public) in 1733 Constructed by Dolland, most likely without any knowledge of Hall's 1757 Herschell's great reflecting telescope, erected at Slough Camera lucida invented by Dr. Wollaston Ramage's front-view reflecting telescope erected at Greenwich 1789 1807 1820 PNEUMATICS. Pressure of the air discovered, by Torricelli 1645 Found to vary with the height, by Pascal 1647 Air-pump invented by Otto Guericke 1654 Air-pump improved and rendered more manageable by Boyle, after the publication of Mechanica Hydraulico Pneumatica," by Schottus, in which Guericke's experiments were described 1657 SHIP-BUILDING.-First treated as a science by Hoste 1696 STEAM-ENGINE. Idea of, by the Marquis of Worcester, in his Century of Inventions, as a way to His engines upon a large scale erected in manufactories, and his patent renewed by act of Parliament Watt's invention of performing condensation in a separate vessel from the cylinder 1765 His first patent Double-acting engine proposed by Dr. Falck on Newcomen's principle 1779 Tried under the direction of Mr. Miller, of Dalswinton, in 1788 Put in practice in America, by Robert Fulton 1807 by Sanctorio, according to Dutch writers by Drebbel, before THERMOMETER. Very imperfeet ones invented, according to Italian writers Fahrenheit's 1626 1730 Reaumur's-(the scale called Reaumur's soon after 1730-the mode of construction, 1742 STATISTICS OF THE STATE OF NEW-YORK. CIVIL DIVISIONS. The State of New-York is divided into Eight Senate Districts, which are also Judicial Districts, or Circuits-Thirty-three Congressional Districts-and Fifty-six Counties, (including Hamilton, at present united with Montgomery.) The Counties are subdivided into Cities and Towns, and some of the Towns into Villages. SENATE DISTRICTS, With the Official Canvass of Votes for Governor, Lieutenant-Goverand Senators, at the General Election held in the month of November, 1832. nor, |