Handy man's workshop and laboratory . tralsupport which revolves on pins. The support can be made asfollows : Procure a cylindrical piece of wood, as shown at A, anddrill holes at angles, dividing the circumference equally. Thenwith a fine saw cut through the center of these holes at rightangles to the axis of the wood. This will provide a set of clamps,which will hold the rods connecting the bulbs in the position asshown on the assembled sketch. The bulbs are then balancedin their support and securely fastened, and the whole mountedon two vertical supports, which are in turn placed on top of
Handy man's workshop and laboratory . tralsupport which revolves on pins. The support can be made asfollows : Procure a cylindrical piece of wood, as shown at A, anddrill holes at angles, dividing the circumference equally. Thenwith a fine saw cut through the center of these holes at rightangles to the axis of the wood. This will provide a set of clamps,which will hold the rods connecting the bulbs in the position asshown on the assembled sketch. The bulbs are then balancedin their support and securely fastened, and the whole mountedon two vertical supports, which are in turn placed on top of a box. 218 HANDY MAN S WORKSHOP AND LABORATORY This box is best made of tin or light sheet iron, and containsinside a deflector through the top of which some small holes arebored, to allow the heat from a small spirit lamp to strike thelowest bulb only. Air holes are provided at one side, on thebottom as shown. The operation is as follows: When the heat strikes the lowerbulb, the liquid evaporates quickly, forming sufficient pressure. Fig. 189—An ornamental heat motor to blow the remaining liquid into the opposite bulb directly ontop. This displaces the center of gravity, as the bulbs overhangthe center, and causes the set to revolve and bring each bulb insuccession over the hot gas from the lamp, producing a rotarymotion. Of course, very little power, if any, can be obtainedfrom such a machine, but as a window attraction it is very suc-cessful. The source of heat being hidden, the sudden upward HANDY MAN S WORKSHOP AND LABORATORY 2IQ, flow of the liquid is mystifying, and very pretty effects can beobtained by using four different colored solutions of alcohol. The sizes of the bulbs should be about ij^ inches diameter,one of each pair being filled slightly over one-half its height withliquid. The distance between the centers of bulbs of the abovediameter should be not less than 9 inches. The tubes shouldextend to within y2 inch of the outer side of each bulb, and theconnectin
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
