ve alarm, to give notice within of the plants under treatment, the scale or vermin can the aperture, the tail being pivoted when the door knob is turned from the outside of the be removed without injuring the trees or plants. in this slot, and having at its outer door, is illustrated herewith, and… … obtained from gas producers. A continuous firing is STREEPER'S ELECTRICAL DOOR ALARM. thus maintained, and the heat regenerative principle involved has resulted in the most efficient and eco- Mr. Daniel H. Streeper, of Norristown, Pa. The door nomical system of burning fire brick yet known. As is…
Munn · Connected · Diamonds · Wheel · Apparatus · Scientific American · Vessels going · Square feet · Horse power · Interior frame · Water power · Feed water · Signal service · Sir william · Large number
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