he wire coincident. Tothe top of the cylinder is attached a projecting arm thatcarries two raised supjoorts a_ and c_. Above this arm isplaced a lever d, resting by a knife-edge on the supporta^. This lever also has an inverted knife-edge but a veryshort distance back of the one that supports its… … X.W XyCL^^L^-l^.c^^...,..cXIj\ 10 the outer end of the lever to rise oi* fall. Standing partlyon the end of this lever and partly on the support c_ is alittle table having three needle-point legs and carrying avertical plane mirror. Now any movement of the lever armrelative to the support _c will…
Magnetism
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