Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 169
d room. For flies, cover the top is tightened. It may, of course, be used with a bell glass, or put them in tlie with a soundboard if desired. (^Eng. box and close up the opening. When Mcch.). using a common pin instead of 6, flies (3) Gives excellent results in trans- may be heard running about… … has a circular hole n cut through it, side (Ji). The carbon block is s\ink slightly into the hole at a, a piece of about 2^ in. in diameter. Over this is copper wire is inserted, and melted gummed some vegetable parchment b,
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
