A course of experiments in physical measurement (1897)
Whiting, Harold, d. 1895 · Boston, D.C. Heath and Co. · leaf 59
nife-edgesby suddenly throwing weight upon them. It is notnecessary in every case to raise the beam as far as it 28 THE BALANGE. [Bxp. 6. will go. A^ soon as tbe pointer mows decidedljtoone side or iljhe At-hei;, the bfiana should he slowlylower:ed again. Jn other cases a prolonged observa-tion of… … door of the balance case shpuld be eJosed, in order tocut off currents of air ; in fact, the door should neverbe opened except when the purposes of manipulationactually require it. This precaution is neoessaii-y toprotect the jnstrHment from moisture and dns.t, andis especially important when the…
Physics
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