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Scientific American, Vol. 79, No. 2 (1898) (1898)

leaf 7

An illustration from Scientific American, Vol. 79, No. 2 (1898), 1898, leaf 7
a slight distance from the hinge post are stated that it takes twelve months or even longer for The Effects of Change of Climate upon Man them to become acclimatized. Dogs, asis well known, two eyes adapted to receive pivot-pins which support and Animals, the gate. To sustain the gate at any… … be pulled down, then the central ing properties of a change of air are SAWYER’S SELF-OPENING GATE. crank-arm acts on the latch-operat- obscure ; at any rate, up to the pres- ing mechanism described and unlocks ent they have not been satisfactorily and opens the gate. Having driven on until the next…

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