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Scientific American, Vol. 44, No. 10 (March 1881) (1881)

leaf 10

An illustration from Scientific American, Vol. 44, No. 10 (March 1881), 1881, leaf 10
cross the water, and ducks tically controlling the temperature of incubating will look much nearer to Ihe box than they really chambers. It is an improvement on a heat regula- are. If a large flock comes to the decoys, by per- tor patented by Mr. Meyer, April 29, 1879, which mitting the first… … beams, which should be of oak one and a half inches BATTERY OR SIiSK BOX. swing in a plane at right angles to the plane of the thick, five inches wide in the center, and reduced at bracelet, these quadrants being drawn inward or everflowing pens. For every fifty feet of track passed over by the…

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