ooden or iron key, or a ment. Nevertheless, he has one in constant use, connecting is constantly being shifted to new points in the rock. spring, placed as described further on. Patented May 1, 1877, through the Sci- The shape of the device is clearly shown entific American Patent Agency. For fur-… … handsome as many of the ornamental in the flange of the rail, which, with the woods. For building lumber and fencing ordinary fish joint, are very necessary to it is preferred to sugar pine. keep the rail from creeping. In this way the workshop of some makers of electrical instruments with Spruce,…
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-279-129.webp)
