Our grandparents thought they were as comfortable as possible, and they were, because they did not know any better. Do we know better? One hundred years from now, possibly, our great, great-grandchildren will consider us as having lived in the "stone age." The field of invention has no bars up,—you, all of us, are free to enter.
"The important thing in life is to have a great aim, and to possess the aptitude and perseverance to attain it."
CHAPTER II.
LOOKING BACKWARD
"Intelligent study and the application of unremitting effort to a definite purpose are the factors that overcome obstacles."
Here follows a list of the principal inventions chronologically arranged, with the names and nationalities of their inventors.
| Year. | Name of Invention. | Name of Inventor. | Nationality. |
| 1620 | Spirally grooved rifle barrel | Blaew | German. |
| 1643 | Barometer | Torricelli | Italian. |
| 1660 | Discovery of Electrical Phenomena | William Gilbert | English. |
| 1663 | Steam engine | Thos. Newcomen | English. |
| 1690 | Steam engine with piston | Denis Papin | French. |
| 1702 | First practical application of steam engine | Thos. Savory | English. |
| 1709 | Thermometer | Fahrenheit | Danzig. |
| 1725 | Franklin printing press | Benj. Franklin | U.S. |
| 1731 | Stereotyping | William Ged | Scotch. |
| 1733 | Weaving flying shuttle | John Kay | English. |
| 1745 | Leyden Jar | Kleist | German. |
| 1752 | Lightning conductor | Benj. Franklin | U.S. |
| 1763 | Spinning jenny | Jos. Hargreaves | English. |
| 1767 | Piano | England. | |
| 1775 | Cut nails | Jere. Wilkinson | U.S. |
| 1777 | Circular wood saw | Miller | English. |
| 1782 | Steam engine | Jas. Watt | Scotch. |
| 1783 | Balloon inflated with gas | Montgolfier | French. |
| 1784 | Puddling iron | Henry Cort | English. |
| 1784 | Cast iron plow | Jas. Small | Scotch. |
| 1786 | Steamboat | John Fitch | U.S. |
| 1787 | Steam road wagon, first automobile | Oliver Evans | U.S. |
| 1788 | Threshing machine | And. Meikle | English. |
| 1791 | Wood planer | Sam'l Bentham | English. |
| 1794 | Cotton gin | Eli Whitney | U.S. |
| 1800 | Electric battery | Volta | Italian. |
| 1801 | Fire-proof safe | Richard Scott | English. |
| 1803 | Steel pen | Wise | English. |
| 1804 | Malleable iron castings | Lucas | English. |
| 1808 | Band wood saw | Newberry | English. |
| 1808 | First sea-going steamboat | John Stephens | U.S. |
| 1810 | Revolving cylinder printing press | Fred'k Koenig | German. |
| 1811 | Breech-loading shot gun | Thornton & Hall | U.S. |
| 1814 | First locomotive, U.S | Geo. Stephenson | English. |
| 1815 | Miner safety lamp | Sir Humphry Davy | English. |
| 1815 | Gas meter | Clegg | English. |
| 1823 | Discovery of water gas | Ibbetson | English. |
| 1825 | Portland cement | Aspdim | English. |
| 1827 | Friction matches | John Walker | U.S. |
| 1828 | Hot blast for iron furnaces | Neilson | Scotch. |
| 1829 | Washington printing press | Sam'l Rust | U.S. |
| 1831 | Chloroform | Guthrie | Scotch. |
| 1832 | Electric telegraph | Prof. Morse | U.S. |
| 1832 | Rotary electric motor | Sturgeon | English. |
| 1832 | "Old Iron Sides" locomotive | Baldwin | U.S. |
| 1833 | Steam whistle | Geo. Stephenson | English. |
| 1834 | Reaper | Cyrus H. McCormick | U.S. |
| 1834 | Carbolic acid | Runge | German. |
| 1835 | Horse-shoe machine | Burden | U.S. |
| 1836 | Acetylene gas | Davy | English. |
| 1836 | Revolver | Sam'l Colt | U.S. |
| 1836 | Screw propeller for steam navigation | John Erickson | U.S. |
| 1837 | Galvanizing iron | Craufurd | English. |
| 1839 | Babbitt metal | Isaac Babbit | U.S. |
| 1839 | Vulcanizing rubber | Goodyear | U.S. |
| 1839 | Daguerreotype | Louis Daguerre | French. |
| 1840 | Artesian wells | French. | |
| 1842 | Automatic piano | Seytre | French. |
| 1844 | First telegram sent | Prof. Morse | U.S. |
| 1845 | Double cylinder printing press | Richard Hoe | U.S. |
| 1845 | Pneumatic tire | Thompson | English. |
| 1846 | Sewing machine | Elias Howe | U.S. |
| 1846 | Ether as an anaesthetic | Dr. Morton | U.S. |
| 1847 | Nitroglycerine | Sobrero | |
| 1847 | Improved Hoe printing press | Richard Hoe | U.S. |
| 1849 | Steam pressure gauge | Bourdon | French. |
| 1849 | Corliss engine | George H. Corliss | U.S. |
| 1850 | Mercerized cotton | John Mercer | English. |
| 1851 | Breech-loading rifle | Maynard | U.S. |
| 1851 | Ice-making machine | Gorrie | U.S. |
| 1852 | Telegraph fire alarm | Channing & Farmer | U.S. |
| 1854 | Diamond rock drill | Herman | U.S. |
| 1854 | Revolver | Smith & Wesson | U.S. |
| 1855 | Cocaine | Gaedeke | German. |
| 1855 | Bessemer steel | Sir Henry Bessemer | English. |
| 1855 | Bicycle | Michaux | French. |
| 1856 | Sleeping car | Woodruff | U.S. |
| 1858 | Cable car | Gardner | U.S. |
| 1858 | First Atlantic cable | Cyrus Field | U.S. |
| 1859 | "Great Eastern" launched | U.S. | |
| 1861 | Passenger elevator | E. G. Otis | U.S. |
| 1861 | Barbed wire fence | U.S. | |
| 1862 | Gattling gun | Dr. R. J. Gattling | U.S. |
| 1865 | Antiseptic surgery | Sir Jos. Lister | English. |
| 1866 | Open hearth steel process | Siemens-Martin | English. |
| 1866 | Torpedoes | Whitehead | U.S. |
| 1868 | Typewriting machine | C. L. Sholes | U.S. |
| 1868 | Dynamite | Nobel | French. |
| 1868 | Oleomargarine | Mege | French. |
| 1868 | Sulky plow | Slusser | U.S. |
| 1869 | Spring tooth harrow | Garver | U.S. |
| 1870 | Celluloid | Hyatt | U.S. |
| 1872 | Automatic brake | Geo. Westinghouse | U.S. |
| 1872 | Car coupler | E. H. Janney | U.S. |
| 1873 | Quadruplex telegraph | Thos. A. Edison | U.S. |
| 1873 | Twine binder harvester | Gorham | U.S. |
| 1873 | Self-binding reaper | Loche & Wood | U.S. |
| 1875 | Roller flour mills | Wegmann | U.S. |
| 1875 | Ice-making machine | Pictet | Switzerland. |
| 1876 | Telephone | Dr. Alex. Graham Bell | U.S. |
| 1877 | Phonograph | Thos. A. Edison | U.S. |
| 1877 | Gas engine | N. A. Otto | U.S. |
| 1877 | Telephone transmitter | Emile Berliner | U.S. |
| 1878 | Carbon filament for electric lamps | Thos. A. Edison | U.S. |
| 1878 | Rotary disc cultivator | Mallon | U.S. |
| 1880 | Telephone transmitter Blake | U.S. | |
| 1880 | Hammerless gun | Greener | U.S. |
| 1880 | Typhoid bacillus | Robert Koch | German. |
| 1880 | Pneumonia bacillus | Sternberg | U.S. |
| 1881 | Buttonhole machine | Reece | U.S. |
| 1882 | Tuberculosis bacillus | Robert Koch | German. |
| 1882 | Hydrophobia bacillus | Louis Pasteur | French. |
| 1884 | Cholera bacillus | Robert Koch | German. |
| 1884 | Diphtheria bacillus | Loefler | German. |
| 1884 | Lockjaw bacillus | Nicolaier | French. |
| 1884 | Antipyrene | Kuno | U.S. |
| 1884 | Linotype machine | Ottmar Mergenthaler | U.S. |
| 1885 | First electric street railway in the U.S. | Baltimore, Md. | |
| 1885 | Overhead electric trolley | Van Depole | U.S. |
| 1886 | Graphophone | Bell & Tainter | U.S. |
| 1887 | Cyanide process | McArthur & Forest | U.S. |
| 1887 | Incandescent gas light | Carl Welsbach | German. |
| 1888 | Harveyized armor plate | Harvey | U.S. |
| 1888 | Kodak snapshot camera | Eastman & Walker | U.S. |
| 1890 | Bicycles equipped with pneumatic tires | U.S. | |
| 1890 | Magazine rifle | Krag-Jorgensen | U.S. |
| 1891 | Rotary steam turbine | Parsons | English. |
| 1893 | Kinetoscope | Thos. A. Edison | U.S. |
| 1893 | Carborundum | E. G. Acheson | U.S. |
| 1893 | Calcium carbide electrically produced | Thos. L. Wilson | U.S. |
| 1895 | Liquifying air | Carl Linde | German. |
| 1895 | X-rays | Prof. Roentgen | German. |
| 1895 | Acetylene gas from calcium carbide | Thos. L. Wilson | U.S. |
| 1896 | Wireless telegraphy | G. Marconi | Italian. |
| 1896 | Finsen rays | Finsen | Danish. |
| 1898 | Non-whittling lead pencil | F. H. Lippincott | U.S. |
| 1900 | Mercury vapor electric light | Peter Cooper Hewitt | U.S. |
| 1901 | Airship | M. Santos-Dumont | French. |
| 1901 | Automobile mower | Deering Harvester Co. | U.S. |
From the Encyclopedia Americana.
"There are no elevators in the house of success."—Silent Partner.
Since the above list (taken from the Encyclopedia Americana) was published, there have been a large number of very important inventions brought out.