Handy man's workshop and laboratory . a. Suspend this button by its eye with a silkthread from a support made by inserting a slender stick about14 inches long into a second potato base, as shown in the illus-tration. Adjust the suspended button so that it will hang ex-actly in the middle of the space between the bell and pie tin, and 248 HANDY MAN S WORKSHOP AND LABORATORY at a height coincident with the edge of the bell. The adjustmentfor height is easily made by drawing the thread through a smallknife cleft in the end of the stick. Cut a piece of newspaper of a width equal to the diameter of
Handy man's workshop and laboratory . a. Suspend this button by its eye with a silkthread from a support made by inserting a slender stick about14 inches long into a second potato base, as shown in the illus-tration. Adjust the suspended button so that it will hang ex-actly in the middle of the space between the bell and pie tin, and 248 HANDY MAN S WORKSHOP AND LABORATORY at a height coincident with the edge of the bell. The adjustmentfor height is easily made by drawing the thread through a smallknife cleft in the end of the stick. Cut a piece of newspaper of a width equal to the diameter ofthe pie tin, and of a length 2 or 3 inches greater than the the paper upon a piece of smooth board, which has beenpreviously well heated in an oven or over the gas range. Holdthe paper down upon the hot board by one of its ends, and withthe palm of the hand rub it strongly and briskly all over in onedirection, using considerable pressure and taking care that thehand is dry and free from all perspiration. After a few strokes. Fig. 206—Ringing a bell by static electricity the paper will become powerfully electrified, and will be foundstrongly adherent to the board by electrical attraction. Now liftthe paper quickly by its two ends, and drop it across the tin,being careful not to let the fingers touch the tin. See also thatthe corners of the paper do not bend down far enough to touchthe table. As the charged paper strikes the tin, the little clapperbegins a vigorous vibration, striking alternately the bell and thepie tin, producing a continuous ringing which persists for sometime. After the button has finally ceased its motion, the mere HANDY MAN S WORKSHOP AND LABORATORY 249 lifting of the paper off the tin causes it to begin again withrenewed vigor. Under good atmospheric conditions it is not always necessarythat the charged paper actually touch the tin plate. Oftentimes its mere presence in the vicinity of the plate, 3 or 4inches above it, is sufficient to set the b
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
