ch- and is surrounded by a strong coiled spring, which ing agent is employed. If two steel plates be serves to keep the left part pressed forward into posi- plunged in a solution of ammonium chloride, tion, and permits backward and forward play of the and the one plate connected with the positive… … plate, A, rests, which snugly fits the aperture in the cover of the vessel, so that it cannot be laterally displaced. The vessel, g, contains a passing through the sole-plate of the car and provided solution of ammonium chloride in which is with supports and springs similar to those of the left…
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