in air, that the at- similar pair of disks are placed on the needle bar plate, as at Fig. 8 shows the cam, I, which gives motion to the shuttle mosphere which contained it when subjected to chemical an- F, Fig. 1, held together by a flat spring and opened by a alysis yielded nothing beyond the… … Those who use sewing machines sannot fail to perceive the movement of the shuttle is, of course, positive, as in other quantity of air of a miasmatic locality is bottled up and is advantages of these simple tension devices. machines. The lower shaft on which the cam, I, is secured conveyed toa…
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