Page:Popular Science Monthly Volume 92.djvu/639

 Popular Science Montlihj

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��on a float or dock and part on the gun- wale when getting on or off — rest your weight equally on both gunwales. Don't stand up in the canoe. If you must change your position while afloat, rest your weight on both gunwales, keep low- down and slide to your desired place. Don't try to paddle from the seats when it begins to get rough — get down on the floor and get there gently. Don't leave the canoe exposed to sun, rain and wind, keep her under cover when not in use. {To he continued)

��Wire ring

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Loops to slip over J pipe

��An Attractive Heat-Driven Window Display of Gas Fixtures

NOT long ago an establishment dealing ingasfixtures, displayed in its window a gaily colored pasteboard clown holding in one hand a well-known type of gas light, while apparently balancing on his nose a lighted lamp, the colored shade of which revolved con- tinuously. A back view of the figure showing the piping and wood braces is displayed in Fig. 1. A gas hose from a convenient stop and con- nected to the brace pipe, furnished the illuminant and motive power.

The latest window display, advertising this same light, is more spectacular than the first. Standing at one side of a moonlight scene, show- ing a large moon rising back of the house tops, stands a gaudily dressed Oriental, who points toward the face of the moon, across which illuminated words move con- stantly. In each display, the ascending current of hot air, generated by the gas light, is the motive power. The mechan- ism is just an adaption of the old hot air wheel the boys used to hang over the cook stove.

The wings are attached to a wire ring, Fig, 3, which is slipped into a deep paper shade, fitting into the shade snugly near the top as shown in Fig. 4. The bottom of the shade is kept in shape by a card- board ring secured with wire clips which pass through the shade. See Fig. 5. A wire support, looped at the bottom to slip

��over the gas pipe, supports the wheel and shade. A small depression in the exact center of the wheel fits over the pointed end of the wire support. Point and de- pression are gaged to a nicety as is evi- denced by the even balance and smooth movement of the shade.

The display just described requires the lamp to be concealed by a semi-circular black cardboard screen. This cuts off the light except at the top and front. The light, projecting through the cut-out, words in the shade, glows through the tissue paper face of the moon, and the col- ored design on the shade produces an effect of moving clouds across the face of the moon. As in the clown display, the light advertised is also prominently shown. Fariv

���OTTsetto II clear II burner

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��Clamps to tasten pipe totioor

��A heat-driven wheel for tioming lettered signs and the arrangement for illuminating the parts of the scene

Methods of anchoring the lamp, also a rear view of the display, are shown in Figs. 2 and 6. Judging from the im- provement in the second display, the use of gas generated hot air, and the simpli- city of the mechanism necessary to utilize it, offers a wade field for attractive window displays. — James M. Kane.

��Permanently Fastening Joints Held vi^ith Screvi^- Unions

IF you desire to fasten pipes or pipe fit- tings together permanently, thorough- ly clean the parts to be fastened and cover the threads with a strong solution of salt and water. The salt will rust the threads together, fastening the parts.

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