Page:The Zoologist, 4th series, vol 5 (1901).djvu/321

Rh Before leaving England experiments were made with the trap at a Lapwing's nest, which were successful three times out of four, only so far as that the bird duly went on and released the shutter. This at first was uncovered and rather noisy, and the bird "jumped"; the fourth try, the shutter having been improved and covered in, was entirely successful. The Lapwing, however, this last time sat on the switch for a couple of hours, and completely exhausted the dry battery,—this contingency not having been allowed for. An automatic cut-off has now been made, and, after the release of the shutter, no more battery action can possibly take place, however long the switch is kept pressed down. The shutter, by the way, was made from my designs by Messrs. Dallmeyer, of Newman Street.