Ledeboer, John H. (John Henry) · London : [s.n] · leaf 182
the screw F. The whole is carried on a bed at B was ground to a knife edge in one gauge and in the frame Z fitted with three levelling screws /, a retaining other ground off square. One tube was '20 in. in diameter spring II, and a scale S, on which may be read the full and the other '15 in. in… … Fig. 8. CHATTOCK GAUGE AND ALCOHOL GAUGE, USED FOR VELOCITY MEASUREMENTS thajt t)he gauge in no way is affected by minor variations in the frame T and directed at the bubble B A small mirror workmanship. on the opposite side illuminates the surface of the bubble. In the gauge with the ground knife…
