s" (1874), "Journal of the Franklin
Institute", October, 1874. For Whitney's contribution to machine shop
methods, see Olmsted's "Memoir" already cited and Roe and Woodworth,
already cited. For Blanchard, see Dwight Goddard, "A Short Story of
Thomas Blanchard" in "Eminent Engineers" (1905), and for Samuel Colt,
see his own "On the Application of Machinery to the Manufacture of
Rotating Chambered-Breech Fire Arms, and Their Peculiarities" (1855),
an excerpt from the "Minutes of Proceedings of the Institute of Civil
Engineers", vol. XI (1853), and Henry Barnard, "Armsmear; the Home, the
Arm, and the Armory of Samuel Colt" (1866).

CHAPTER IX

"The Story of Electricity" (1919) is a popular history edited by T.
C. Martin and S. L. Coles. A more specialized account of electrical
inventions may be found in George Bartlett Prescott's "The Speaking
Telephone, Electric Light, and Other Recent Electrical Inventions"
(1879).

For Joseph Henry's achievements, see his own "Contributions to
Electricity and Galvanism" (1835-42) and "On the Application of the
Principle of the Galvanic Multiplier to Electromagnetic Apparatus"
(1831), and the accounts of others in Henry C. Cameron's "Reminiscences
of Joseph Henry" and W. B. Taylor's "Historical Sketch of Henry's
Contribution to the Electro-Magnetic Telegraph" (1879), Smithsonian
Report, 1878.

"A List of References on the Life and Inventions of Thomas A. Edison"
may be found in the Division of Bibliography, U. S. Library of Congress
(1916). See also F. L. Dyer and T. C. Martin, "Edison; His Life and
Inventions" (1910), and "Mr. Edison's Reminiscences of the First Central
Station" in "The Electrical Review", vol. XXXVIII. On other
special topics see: F. E. Leupp, "George Westinghouse, His Life and
Achievements" (1918); Elihu Thomson, "Induction of Electric Currents and
Induction Coils" (1891), "Journal of the Franklin Institute", August,
1891; and Alex Dow, "The Production of Electricity by Steam Power"
(1917).

CHAPTER X

Charles C. Turner, "The Romance of Aeronautics" (1912); "The Curtiss
Aviation Book", by Glenn H. Curtiss and Augustus Post (1912); Samuel
Pierpont Langley and Charles M. Manly, "Langley Memoir on Mechanical
Flight" (Smithsonian Institution, 1911); "Our Atlantic Attempt", by
H. G. Hawker and K. Mackenzie Grieve (1919); "Flying the Atlantic
in Sixteen Hours", by Sir Arthur Whitten Brown (1920); "Practical
Aeronautics", by Charles B. Hayward, with an Introduction