Patents

1879 Scientific American  
Inside P�1ire, encl •. insert ic:tn ---,. 5 cellt� n line. Back Page, each tnsertion ••• $1.00 a line. (About eignt words to a line.) Engra1}ingamayhead advertisement8 at the 8ame r·ate per ltne, by meaaurement, as the letter press . Adver tisement8 must be received at puhlication office as early as Thur8day morning to appear in next is8ue.
doi:10.1038/scientificamerican05241879-334 fatcat:4duopm43pjfzfglpprkoc3fihq