On the impregnation of the ovum in the Amphibia: (Second series, revised.) And on the direct agency of the spermatozoon. (From the Philosoph. Transactions. P. II for 1853.) |
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Page 245
... point of a pin to the surface of a single egg in a glass cell ; and then observing beneath the microscope the number of spermatozoa deposited from the point of the pin , applied in a similar way as to the egg , on a plate of glass . Yet ...
... point of a pin to the surface of a single egg in a glass cell ; and then observing beneath the microscope the number of spermatozoa deposited from the point of the pin , applied in a similar way as to the egg , on a plate of glass . Yet ...
Page 247
... Pin - point application of the fluid . - These experiments were commenced in the season of last year ( 1851 ) , but have been repeated at different periods during the season of the present year . March 30 , 1851. Atmosphere 56 ° FAHR ...
... Pin - point application of the fluid . - These experiments were commenced in the season of last year ( 1851 ) , but have been repeated at different periods during the season of the present year . March 30 , 1851. Atmosphere 56 ° FAHR ...
Page 248
... pin point , during its momentary contact with the egg , in these experiments . But the result seemed to give but little hope that either of the experiments would be suc- cessful , or that any fecundation could be effected by the ...
... pin point , during its momentary contact with the egg , in these experiments . But the result seemed to give but little hope that either of the experiments would be suc- cessful , or that any fecundation could be effected by the ...
Page 249
... pin point dipped lightly into the fluid for each egg . This experiment was perfectly successful , as the chamber was ... pin had been allowed to remain in contact with the egg , and the fluid to drain off it for one or two seconds . Six ...
... pin point dipped lightly into the fluid for each egg . This experiment was perfectly successful , as the chamber was ... pin had been allowed to remain in contact with the egg , and the fluid to drain off it for one or two seconds . Six ...
Page 256
... pin - head loaded with fluid obtained about twenty - five minutes before , while the other three were each touched once with the fine pin - point loaded in like man- Yet although there was only an interval of one minute between the ...
... pin - head loaded with fluid obtained about twenty - five minutes before , while the other three were each touched once with the fine pin - point loaded in like man- Yet although there was only an interval of one minute between the ...
Other editions - View all
On the Impregnation of the Ovum in the Amphibia: (Second Series, Revised ... Ge Newport No preview available - 2015 |
On the Impregnation of the Ovum in the Amphibia ... (First Series ... Second ... George Newport No preview available - 2016 |
Common terms and phrases
abundance act of fecundation aėration Amphibia appeared applied artificial impregnation beneath the microscope Busk chamber was formed chloroform circumstances diffluence effected efferential ducts eggs were passed embryos were produced endosmic action endosmosis envelopes fact FAHR fecundated egg fecundatory agent fecundatory influence female fluid employed four hours GEORGE NEWPORT germinal vesicle glass cell imbibition instance liquor seminis male mature mixed with water motionless narcotized number of spermatozoa observations obtained ovary oviduct oviposition ovum penetration Philosophical Transactions pin point pin-head power of motion PREVOST and DUMAS produced an embryo produced embryos quantity of spermatozoa quantity of water remained respiratory chamber Sciences Nat season seemed segmentation commenced Semen seminal fluid separate cells solution of potass SPALLANZANI spermatic bodies spermatic fluid spermatozoal cells substance supplied surrounding medium tion Toad touched once tozoon Triton triturated underwent segmentation vesiculę seminales vitality vitellary membrane vitelline membrane WAGNER and LEUCKARDT white surface yelk