. Bulletin - United States National Museum. Science. Figure 30.—Model 623 Small Price current meter showing the Covert yoke. for the yoke, the 623 and 624 models are identical. Each was provided with both single and penta interchangeable contact cham- bers. (USNM cat. no. 323836; Smithsonian photo 44537-D.). «^:%. 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;

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. Bulletin - United States National Museum. Science. Figure 30.—Model 623 Small Price current meter showing the Covert yoke. for the yoke, the 623 and 624 models are identical. Each was provided with both single and penta interchangeable contact cham- bers. (USNM cat. no. 323836; Smithsonian photo 44537-D.). «^:%. 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