Image from page 44 of "Mechanics for young America; how to build boats, water motors, wind mills, searchlight, electric burglar alarm, ice boat ... etc.; the directions are plain and complete. Reprinted from Popular mechanics" (1905)
Title: Mechanics for young America; how to build boats, water motors, wind mills, searchlight, electric burglar alarm, ice boat ... etc.; the directions are plain and complete. Reprinted from Popular mechanics
Subjects: Industrial arts
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation
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Text Appearing Before Image:
hismanner unite all the gores in pairs| until there are but 16 parts. Con-Top: tinue to unite them until you have two halves. Join these very care-fully, closing the balloon at the top com-pletely. Each time you paste a gore hangthe part up until perfectly dry before usingit further. In the bottom of the balloon work acircle of wire 6 inches in diameter and fast-en a wire with a piece of sponge strung onit across the circle of wire. POPULAR MECHANICS. 45 MECHANICS FOR YOUNG AMERICA HOW TO MAKE A HECTOGRAPH. A hectograph is very simply and easilymade and by means of it many copies ofwriting can be obtained from a single orig-inal. Make a tray of either tin or pasteboard,a little larger than the sheet of paper youordinarily use and about 14-inch deep. Soak1 ounce of gelatine in cold water over nightand in the morning pour off the water.Heat 6*2 ounces of glycerine to about 200degrees F. (93 C.) on a water bath, and addthe gelatine. This should give a clearglycerine solution of gelatine.
Text Appearing After Image:
Using the Hectograph. Place the tray so that it is perfectlylevel and pour in the gelatinous composi-tion until it is nearly leve) with the edge ofthe tray. Cover it so the cover does nottouch the surface of the composition and letit stand six hours, when it will be readyfor use. Make the copy to be reproduced on or-dinary paper with aniline ink; using a steelpen, and making the lines rather heavy sothey have a greenish color in the light. Agood ink may be made of 1 ounce of ani-line (2 R B or 3 B) dissolved in 7 fluidounces of hot water. Cool and add 1 fluidounce of glycerine, a few drops of etherand a drop of carbolic acid. Keep in acorked bottle. When the original copy of the writing isready moisten tne surface of the hectograph slightly with a sponge, lay the copy facedown upon it and smooth down, beingcareful to exclude all air bubbles and notshifting the paper. Leave it nearly a min-ute and raise one corner and strip it fromthe pad, where will remain a reversed copyof the inscri
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