792 



Magnetism. 



N,, tin in:, 



60 116. 1 : 2. 



60 118. 1 : 1 



60 120. 1 : 4. 



60 121. 



60 119. 1 : 4. 



Compass with nickel case, watch form, stops when cover is closed. 



s. d. 



60,118. Precision Compass, Figure, for finding the poles in magnetic fields 



The instrument is watch form anil is closed on both sides by \\at.-h glasses only, thus renderum 

 the magnetic needle visible. The needle itself is very light, well halan-cd and rests in stones. 



io.ll't. Ship's Compass, Figure, in Cardan suspension, on stand, card 80 mm diameter 1. 

 60,120. Ship's Compass (Fluid Compass), Figure, with card floating on alcohol .... 4. 



This instrument is specially adapted for explaining the fluid compass. Tin- compass curd floats 

 almost aperiodically in the liquid. The apparatus is the standard model of >hip's compass of the 

 Marine and as such, it is, alonj; with its case, let into the ship's lio\. 



0. IL'.O 



K). o 

 .-.() 



i i 



