1838--Professor Morse’s French patent for Telegraph. Jacobi’s Galvano-plastic process for making Electrotype Printing Plates. Reflecting Stereoscope by Wheatstone. Dry Gas Meter by Defries. 1839--Wreck of Royal George blown up by Electro Blasting. Jacobi builds first Electrically propelled Boat. Fox Talbot makes Photo Prints from Negatives. Professors Draper and Morse make first Photographic Portraits. Mungo Ponton applies Bichromate of Potash in Photography. Goodyear discovers process of Vulcanizing Rubber. Lanthanum and Didymium discovered by Mosander. Babbit Metal invented. 1840--Professor Morse’s United States patent for Electric Telegraph. Professor Grove makes first Incandescent Electric Lamp. Celestial Photography by Professor Draper. 1841--Artesian well bored at Grenelle, Paris. Sickel’s Steam Cut-off. Talbotype Photos. M. Triger invents Pneumatic Caissons. 1842--First production of Illuminating Gas from water (water gas) by M. Selligue. Robt. Davidson builds Electric Locomotive. Nasmyth patents Steam Hammer. 1843--Joule’s demonstration as to the Nature of Force. Erbium and Terbium discovered by Mosander. The Thames Tunnel Opened. 1844--First Telegraphic Message sent by Morse from Washington to Baltimore. Application Nitrous Oxide Gas as an Anæsthetic by Dr. Wells. 1845--Ruthenium discovered by Klaws. The Starr-King Incandescent Electric Lamp. The Hoe Type Revolving Machine. 1846--House’s Printing Telegraph. Howe’s Sewing Machine. Suez Canal Started (fourteen years building). Crusell of St. Petersburgh invents Electric Cautery. Use of Ether as Anæsthetic by Dr. Morton. Artificial Legs. Discovery of Planet Neptune. Sloan patents Gimlet Pointed Screw. Gun Cotton discovered by Schönbein. 1847--Chloroform introduced by Dr. Simpson. Nitro-Glycerine discovered by Sobrero. Time-Locks invented by Savage. 1848--Discovery of Satellites of Saturn by Lassell. Bain’s Chemical Telegraph. Bakewell’s Fac-Simile Telegraph. 1849--Bourdon’s Pressure Gauge. Lenticular Stereoscope by Brewster. Hibbert’s Latch Needle for Knitting Machine. Corliss Engine. 1850--First Submarine Cable--Dover to Calais. Collodion Process in Photography. Mercerizing Cloth. American Machine-made Watches. 1851--Dr. Page’s Electric Locomotive. The Ruhmkorff Coil. Scott Archer’s Collodion Process in Photography. Seymour’s Self-Raker for Harvesters. Helmholtz invents Opthalmoscope. Maynard Breech Loading Rifle. 1852--Channing and Farmer Fire Alarm Telegraph. Fox Talbot first uses reticulated screen for Half Tone Printing. 1853--Gintl’s Duplex Telegraph invented. Electric Lamps devised by Foucault and Duboscq. Watt and Burgess Soda Process for Making Wood Pulp. 1854--Wilson’s Four Motion Feed for Sewing Machines. Melhuish invents the Photographic Roll Films. Hermann’s Diamond Drill. Smith and Wesson Magazine Firearm (Foundation of the Winchester).