Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 173
impossiblechemical solutions ; and the best evidence of their worth-lessness is their failure. In the United States Patent Office over 400 patents havebeen issued since 1790. These are all chiefly interestingfrom the impossibility, inherent in their nature, of practi-cal operation. Much ingenuity… … FiG. I.—Old type of cylinder, showing complicated and cumbersome external end-gate. Tuercial initiative in fireproofing wood. In fact, the actualapparatus, identical in almost every feature, used by thefirst company to fireproof wood for private and govern-mental uses, was for some time used to…
Science · Technology · Meteorology · Patents
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