Worst, Edward F. (Edward Francis), 1866-1949, Barber, Harriette, [from old catalog] joint author, Seymour, Marian, [from old catalog] joint author · Chicago, A. W. Mumford and company · leaf 260
. A slit is cut into this circular piece of wood tO re-ceive a piece of tempered clock or watch spring which maybe had of .any watch-maker for only the asking. A piece of Y^ iron or brass wire is thrust into a hole inthe upright piece to the right and presses against a screwput in from the back.… … FIGURE XIX. While performing experiments the test tube holder isquite indispensable. The above shows a very simple way of making one. TRIPOD.
Manual training · Paper work · Basket making
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