...its nucleus. Thus, some consider that the vitelline membrane sends in partitions to divide the yolk mechanically. Others have formed the idea that the...vesicle divides first, and that the molecules of the yolk are attracted round the two centres so formed. But numerous observations had satisfied the author...

...its nucleus. Thus, some consider that the vitelline membrane sends in partitions to divide the yolk mechanically. Others have formed the idea that the...vesicle divides first, and that the molecules of the yolk are attracted round the two centres so formed. But numerous observations had satisfied the author...

...its nucleus. Thus, some consider that the vitelline membrane sends in partitions to divide the yolk mechanically. Others have formed the idea that the...vesicle divides first, and that the molecules of the yolk are attracted round the two centres so formed. But numerous observations had satisfied the author...

...clement that the embryo is formed. The supporters of an exclusive cell doctrine have endeavored to show that there is always a direct descent either from...molecules of the yelk are attracted round the two centres BO formed. But numerous observations have satisfied me that both spermatozoid and germinal vesicles...

...nucleus. Thus some consider that the vitelline membrane sends in partitions to divide the 443 yolk mechanically. Others have formed the idea that the...its included granules constitute the germs of those colls which subsequently form in the germinal mass. Others, again, suppose that on impregnation the...