inclosed within the cover is formed of and then to be returned to their owners. One of the two sections. These sections may be doubled on each by various peculiarities of construction. originators of the movement has offered sixty of the Referring to our illustration, it will be observed that other… … DOUBLE AUTOMATIC TREAD-SANDING MACHINE. valve-stem connected with the float, a mercury-reser- the cover is hinged to a lug. By means of this con- his offer he said that many persons spend a part of voir, and passageways for the gas. Unlike the valve- struction, the cover may be quickly displaced…
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