A WEEKLY JOURNAL OF PRACTICAL INFORMATION IN ART, SCIENCE, MECHANICS, CHEMISTRY AND MANUFACTURES j SINGLE COPIES SIX CENTS. NEW YORK, FEBRUARY 28, 1863. VOL. VIII.—NO. 9. 1 '$3 PER ANNUM—IN ADVANCE. (NEW SERIES.) ' COMSTOCK'S PATENT EOTAEY SPADER. … Improved Eotary Spader. The strap, d, attached to the hinder end of tho cam, has a The cultivation of the soil by piece of india-rubber interposed mechanical means grows in pop- between it and the same, which ularity every day. A few years serves as a spring. The forks are ago our farmers regarded…
Patents · Combination · Claim · Manner · Purpose · Patented · Purpose set · York city · Twelve months · Scientific American · Carbonic acid · Patent office · Acid gas · Address munn · Purposes set · Mechanical power
Internet Archive · Public domain (published before 1931). Free to use for anything.
