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Containing partly evacuated having two bulbs with two
arrangements of vane, containing at its centre a fine pivot which supports four
light weight metal arms. One side of every ...
A copper cylindrical vessel fitted with 5 different rods of copper, brass, iron, aluminium, & zinc.
Containing a brass cylinder, with an V pulley in the lower portion of the cylinder and steel shaft which fits into a bearing block. A vertical column conveys the cork lined friction arms and thermo...
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