. Bulletin - United States National Museum. Science. U. S. NATIONAL MUSEUM BULLETIN 173 PLATE 20. Engine indicators. 1. McXaught, c. 1835-1842 ( no. 307516). See p. 91. 2. Richards, c. 1867 ( no. 307515). See p. 92. 3. Crosbv, 1879 (model; no. 308701). See p. 92. ^ 4. Indicator with continuous card appliance, 1930 ( no. 3098.^4). bee p 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 Uni
. Bulletin - United States National Museum. Science. U. S. NATIONAL MUSEUM BULLETIN 173 PLATE 20. Engine indicators. 1. McXaught, c. 1835-1842 ( no. 307516). See p. 91. 2. Richards, c. 1867 ( no. 307515). See p. 92. 3. Crosbv, 1879 (model; no. 308701). See p. 92. ^ 4. Indicator with continuous card appliance, 1930 ( no. 3098.^4). bee p 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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