Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 45
The support of the annular frame, shown in vertical sec-tion in Fig. 15, consists of an inner and outer tube, the innertube having a closed upper end terminating in a pivotalpoint. The lower end of this tube communicates with thehorizontal tube, through which air is supplied to the ma-chine. A… … Pneumatic Gyroscope. THE GYROSCOPE. 23 on the pointed end of the inner tube. The inner tube isperforated near its pointed end, to permit of the escape ofair to the interior of the sleeve, and the lower end of thesleeve is sealed by a quantity of mercury contained by thespace between the inner and…
Physics · Lantern projection · Electric apparatus and appliances
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