he other side at the bot-tom, they are made to rotate, draw air out of the sewer,and force it up the pipes into the atmosphere. The fans,therefore, are self-acting; and, if properly constructed andfixed, will not get out of order. If, in addition to the usualdrain communications, pipes are laid… … lUFBOVED SHOEMAKEBS FINCHEBS. Mr. William H. Hanna, of Chico, Butte county, California,has recently patented, through the Scientific American Pat-ent Agency, an improved form of shoemakers pinchers, an engraving of which we here-with present. It will be observed that thedistance between the ends…
Patents · Improved · Center · Iron · Consists · Scientific American · Hydrochloric acid · Cubic feet · Optic couches · Carbolic acid · Cast Iron · Sewing machine · Steam engine · Warm air · Carbonic acid
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