A laboratory course in experimental physics (1896)
Loudon, W. J. (William James), McLennan, John Cunningham, joint author · New York and London, Macmillan and Co. · leaf 25
an be so adjusted thata fractional part of a rotation may be given to the screw ; and acarriage EE, which slides along the smooth rail / attached tothe solid base A. This carriage EE, on which are supported atracing point .Fwith a handle G, and a microscope H, by meansof which the rulings are… … SPECIFIC GRAVITY BOTTLE. 15 the platform J directly beneath the tracing point, and the micro-scope. Scales on metal may be ruled either directly by using ahardened steel tracing point, or by ruling on a wax-coveredsurface, and then etching in with acid. This latter method mayalso be adopted in the…
Physics
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