la- to repeat the exhaustion more than once. Without such a tors for holding the wires. bulb, the rilling of the U tube through these fine capillary tubes is found somewhat tiresome. The emptying of the IT It is claimed that posts of this form are cheaper tube is effected by reversing the action… … cover. The graphite is in the form of a cylinder and is se- cured as described further on. Upon the cover are the two electrodes, D and E, consisting of rods of braes at the upper extremities of which are spring clamps which hold the spi- ral of platinum wire. One electrode, D, is attached directly…
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