NT in design, and is also furnished with holes, D, and flat- a second folding then brings it to the shape a full account ol all improvements in machinery will be given. there i3 a sleeve inside which covers them up when shown in Fig. 2, which is just half the size of the ac- Also, practical… … terest to Patentees and Inventors. The Publishers feel warranted in saying that no other journal now BOYNTON'S DAMPER AND VENTILATOR. published contains an equal amount of useful information white it is their aim to present all subjects in the most populai andattrac;- the sleeve are connected…
Claim · Combination · Patents · Manner · Constructed · Purpose · Arranged · York city · Times heavier · Purpose set · American patent · Scientific American · Address munn · Specific gravity · Des pere · Carbonic acid · Steam engine
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