T

Tank, Military : Sir Ernest Swinton, England, 1914.

Tape Recorder : Valdemar Poulsen, Denmark, 1899.

Teflon : DuPont, U.S.A., 1943.

Telegraph : Samuel F. B. Morse, U.S.A., 1837.

Telephone : Alexander Graham Bell, U.S.A., 1837.

Telephoe, Mobile : Bell Laboratories, U.S.A., 1946.

Telescope : Hans Lippershey, The Netherlands, 1608; (astronomical) Galileo Galilei, Italy, 1609; (reflecting) Isaac Newton, England, 1668.

Television : Vladimir Zworykin, U.S.A., 1923, and also kinescope (cathode ray tube) 1928; (mechanical disk-scanning method) successfully demaonstrated by J. L. Baird, Scotland, C. F. Jenkins, U.S.A., 1926; (first all-electric television image) Philo T. Famsworth, U.S.A., 1927; (color, mechanical disk) Baird, 1928; (color, compatible with black and white) George Valensi, France, 1938; (color, sequential rotating filter) Peter Goldmark, U.S.A., first introduced, 1951; (color, compatible with black and white) commercially introduced in U.S.A., National Television Systems committee, 1953.

Thermodynamics : (first law : energy cannot be created or destroyed, only converted from one from to another) Julius Von Mayer, Germany, 1842; James Joule, England, 1843; (second law : heat cannot itself pass from a colder to a warmer body) Rudolph Clausius, Germany, 1850; (third law : the entropy of ordered solids reaches zero at the absolute zero of temperature) Walter Nernstm Germany, 1918.

Thermometer : (open-column) Galileo Galilei, c.1593; (clinical) Santorio Santorio, Padua, c.1615; (mercury, also Fahrenheit scale) Gabriel D. Fahrenheit, Germany, 1714; (centigrade scale) Anders Celsius, Sweden, 1742; (absolute-temperature, or Kelvin, scale) William Thompson, Lord Kelvin, England, 1848.

Tire, Pneumatic : Robert W. Thompson, England, 1845; (bicycle tire) John B. Dunlop, Northern Ireland, 1888.

Transformer, Electric : William Stanely, U.S.A., 1885.

Transistor : John Bardeen, Walter H. Brattain, William B. Shockley, U.S.A., 1947.

Typewriter : Christopher Sholes, Carlos Glidden, U.S.A., 1867.