. Bulletin - United States National Museum. Science. Figure 3.—^Transit telescope made by David Rittenhouse and used by him for the observation of the transit of Venus in 1769. Brass, 33j^-in. tube on a 25- in. axis, with an aperture of 1^4 in. and a focal length of 32 in. Photo courtesy the American Philosophical Society. related records has revealed that only a few of the many clock- makers working in the American Colonies in the 18th century made mathematical instruments. Yet, a large proportion of the surviv- ing surveying and nautical instruments produced before 1800 were the work of cloc
. Bulletin - United States National Museum. Science. Figure 3.—^Transit telescope made by David Rittenhouse and used by him for the observation of the transit of Venus in 1769. Brass, 33j^-in. tube on a 25- in. axis, with an aperture of 1^4 in. and a focal length of 32 in. Photo courtesy the American Philosophical Society. related records has revealed that only a few of the many clock- makers working in the American Colonies in the 18th century made mathematical instruments. Yet, a large proportion of the surviv- ing surveying and nautical instruments produced before 1800 were the work of clockmakers. Classic among these must be noted the instruments produced by the brothers David and Benjamin Ritten- house (see p. 15 and figs. 3 and 4), as well as the fine surveying instruments made by four separate members of the Chandlee family, whose clockmaking traditions began early in the 17th cen- tury (see p. 54). 11. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
