Inside Out Library · Explore

Scientific American, Vol. 44, No. 11 (March 1881) (1881)

leaf 7

An illustration from Scientific American, Vol. 44, No. 11 (March 1881), 1881, leaf 7
er heater supplying not only the boiler into a loop form to receive the other end of the band. Mr. Edward P. Haff, of Brooklyn, N. Y., has patented a with water at over 200°, but supplying a large quantity of ness, to ask how slate pencils are made than it is for the boy of larger growth to answer;… … MACHINE FOR MAKING SLATE PENCILS. the water securely while being raised are separated, and the finished pencils and when standing in the spout, which are delivered in a receiver at the end can be readily emptied in part or wholly, and which is sim- hot waterbesidesfor other purposes, and which…

Patents · Patented · Iron · Manufacture · Winkle · Illustrated · Scientific American · Glass · Patent office · Carbolic acid · Cast Iron · Test tube · Letters patent · Radiant energy · Wood working · Iron columns · San Francisco

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 44, No. 11 (March 1881)

More like this