tly •m i » i m ■ GAS for illuminating purposes is sold by a private apparatus of almost any kind may be shown to advan- different elevations, and a short distance apart to company at Plymouth, England, for Is. 9d. per 1,000 tage in this way. secure soft shadows. When three burners are used, feet,… … being about the right fo- ter. The lens is Fig. 3.-F0LDING BOX PARTLY Fig. 4.-MEGASC0PE WITHOUT BOX. cus. They are not expen- mounted in a soft CLOSED. sive, and may be obtained wood ring, a n d Is. lOd. per 1,000 feet. This is equal to 42 and 44 cents of a diameter of six or seven inches. Two or…
Patents · Adapted · Munn · Scientific American · Device · Reduction company · Express money · Horse power · American supplement · Trade mark · American patent · Pittsburg reduction · Pure aluminum · Assistant secretary
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