e recessed with a shoulder for the glass to fit against, or rings of pasteboard washed away or down through the soil by rains. may be glued on either side to hold them in. A Again, by its color, it absorbs the heat of the sun, and A. Field fur Work under the Sea. tolerable fastening may be obtained… … for this purpose. In general terms, the thirty or forty feet down it is the type of APPARATUS FOB ILLUSTBATINO THE LAW OF THE distance from the candle to its lens, and constancy of conditions. The prediction is BEFLECTION OF LIGHT. from the other lens to the screen, should formally made by the…
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