...appearance on the stone : at first, each of them fixed itself for a considerable time in one spot, appearing to feed by suction, but when a ray of light from the...and removed itself to the shaded part of the stone. . . . . Mr. Crosse adds, ' I have never ventured an opinion as to the cause of their birth ; and for...

...been far some time after their birth apparently averse to motion. In the course of" a few weeks, abput a Hundred of. them made their appearance on the -stone....the stone. Out of about a hundred insects, not above five^or six were born • on the soqth side, of the stone. I examined some of them with -the microscope,...

...each of them fixed itself for a considerable time in one place, as far as I could judge, appearing to feed by suction ; but when a ray of light from the sun was let fall upon it, it seemed much disturbed, and finally removed itself to the shaded side of the stone....