. Pictures of bird life : on woodland meadow, mountain and marsh . Egg-shells set .as Bait for Crows or Jackdaws. Plate exposed by Fingertouching Green Silk stretched over Eggs. 28 Pictures of Bird Life. JB S, Spring ; S, Screw,—both connected with insulated wires to batteryand electro-magnet of shutter. The slightest touch on silk causes S totouch 5, which completes the electric circuit, and causes the shutter toopen and shut, wherebj the plate is exposed. The camera, it is needless to say. niiist be most carefullyconcealed ; it is, in fact, upon the thorouoli concealment thateventual success
. Pictures of bird life : on woodland meadow, mountain and marsh . Egg-shells set .as Bait for Crows or Jackdaws. Plate exposed by Fingertouching Green Silk stretched over Eggs. 28 Pictures of Bird Life. JB S, Spring ; S, Screw,—both connected with insulated wires to batteryand electro-magnet of shutter. The slightest touch on silk causes S totouch 5, which completes the electric circuit, and causes the shutter toopen and shut, wherebj the plate is exposed. The camera, it is needless to say. niiist be most carefullyconcealed ; it is, in fact, upon the thorouoli concealment thateventual success depends, for very many birds will not ap})roachtheir nest if their suspicions are too much aroused, but willdesert their eggs alto^-ether, and some birds will even deserttheir young ones. I lun e known iurtle-doAes to do so ; butthis is, I imagine, a very extreme case. When a nest is, like a Lapwing s, placed in the middleof a field on the bare ground, it is not an easy task to sodiso-uise the camera as not to alarm tlie ])arent birds. It isimpossible, of course, to so conceal it as to leave nothing sus-picious ; there must be some lump which did not exist before,however you may attempt to do
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirdspi, bookyear1903
