The object of this Work, of which one single copy only was printed, is to ascertain by experiment the tints of the paper and colours of the inks least fatiguing to the eye.
One hundred and fifty-one variously-coloured papers were chosen, and the same two pages of my stereotype Table of Logarithms were printed upon them in inks of the following colours: light blue, dark blue, light green, dark green, olive, yellow, light red, dark red, purple, and black.
Each of these twenty volumes contains papers of the same colour, numbered in the same order, and there are two volumes printed with each kind of ink. {495}
The twenty-first volume contains metallic printing of the same specimen in gold, silver, and copper, upon vellum and on variously-coloured papers.
For the same purpose, about thirty-five copies of the complete table of logarithms were printed on thick drawing paper of various tints.
An account of this work may be found in the Edin. Journ. of Science (Brewster’s), 1832. Vol. vi. p. 144.
44. Economy of Manufactures and Machinery. 8vo. 1832.
There are many editions and also American reprints, and several Translations of this Work into German, French, Italian, Spanish, &c.
45. Letter to Sir David Brewster, on the Advantage of a Collection of the Constants of Nature and Art.—Brewster’s Edin. Jour. of Science. 1832. Vol. vi. p. 334. Reprinted by order of the British Association for the Promotion of Science. Cambridge, 1833. See also pp. 484, 490, Report of the Third Meeting of the British Association. Reprinted in Compte Rendu des Traveaux du Congres Général de Statistique, Bruxelles, Sept. 1853.
46. Barometrical Observations, made at the Fall of the Staubbach, by Sir John Herschel, Bart., and C. Babbage, Esq.—Brewster’s Edin. Jour. of Science. Vol. vi. p. 224. 1832.