. Bacteriology and mycology of foods. Food. Fig. 28.—Spencer Lens Company's Micrometer Eyepiece. " Upon the axis of the screw is placed an adjustable drum which may be set to any desired position. This is graduated with one hundred divisions, for reading of which an index pointer is fastened on top of the micrometer case " In measuring the length of an object, the scale is moved until one of the millimeter lines coincides with the margin of the object under examination; as for example, line No. 0 in the sketch, then, holding the milled head of the screw fast, the drum is turned until
. Bacteriology and mycology of foods. Food. Fig. 28.—Spencer Lens Company's Micrometer Eyepiece. " Upon the axis of the screw is placed an adjustable drum which may be set to any desired position. This is graduated with one hundred divisions, for reading of which an index pointer is fastened on top of the micrometer case " In measuring the length of an object, the scale is moved until one of the millimeter lines coincides with the margin of the object under examination; as for example, line No. 0 in the sketch, then, holding the milled head of the screw fast, the drum is turned until the index stands at zero. Now turning the screw until the line which the other edge of the drum added to the number of full | mm. divisions covered (nine in the sketch) gives the apparent length of the object —its real length depending on magnification 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 Tanner, Fred Wilbur, 1888-1957. New York, John Wiley & Sons, Inc. ; [etc. ,etc. ]
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectfood, bookyear1919
