 ... some time after their birth, apparently averse to motion. In the course of a few weeks, about a hundred of them made their appearance on the stone. At first each of them fixed itself for a considerable time in one spot, appearing to feed by suction,...  The Experimental Philosopher - Page 448de William Mullinger Higgins - 1838 - 488 pagesAffichage du livre entier - À propos de ce livre
 | John Claudius Loudon, Edward Charlesworth, John Denson - 1838 - 706 pages
...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...five or six were born on the south side of the stone. On being examined with a microscope the smaller ones appeared to have only six legs, but the larger... | |
 | 1838 - 736 pages
...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 sun \vas directed upon it, it seemed disturbed, and removed itself to the shaded part of the stone. Out... | |
 | Henry Duncan - 1839 - 436 pages
...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...five or six were born on the south side of the stone. On being examined with a microscope, the smaller ones appeared to have only six legs, but the larger... | |
 | 1841 - 444 pages
...observed that at first each of them fixed itself for a considerable time in one spot, appearing, as far 1 could judge, to feed by suction : but when a ray of light from the sun was directed upon it, it seeme-il disturbed, and removed itself to the shaded part of the stone. Out of about a hundred insects,... | |
 | Perry Fairfax Nursey - 1844 - 474 pages
...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...and removed itself to the shaded part of the stone Mr. Crosse adds, " I have never ventured an opinion at to the саше of their birth ¡ and for a... | |
 | 1844 - 476 pages
...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...and removed itself to the shaded part of the stone Mr. Crosse adds, " / have never ventured an opinion ai to the cause of their birth ; and for a very... | |
 | 1844 - 490 pages
...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 suu was directed upon it, it seemed disturbed, and removed itself to the shaded part of the stone Mr.... | |
 | Henry Duncan - 1847 - 430 pages
...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...five or six were born on the south side of the stone. On being examined with a microscope, the smaller ones appeared to have only six legs, but the larger... | |
 | Henry M. Noad - 1849 - 534 pages
...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...and removed itself to the shaded part of the stone Mr. Crosse adds, " / have never ventured an opinion as to the cause of their birth ; and for a very... | |
 | Henry Minchin Noad - 1855 - 574 pages
...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 a very... | |
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