which it has but just become distinguished from the 

 egg in which it arises, it is nothing but an aggregation 

 of such corpuscles, and every organ of the body was 

 once no more than such an aggregation." Now, in be- 

 ginning with the egg an absolute beginning being de- 

 nied us in consequence of the pre-existent infinite 

 difference of the egg or eggs themselves we may 

 gather from the German physiologists some such ac- 

 count of the actual facts as this. 



The first change signalized in the impregnated egg 

 seems that of Furchung, or furrowing what the Ger- 

 mans call the Furchungskugeln, the Dotterkugeln, form. 

 Then these Kugeln clumps, eminences, monticles, we 

 may translate the word break into cells ; and these 

 are the cells 9f the embryo. Mr. Huxley, as quoted, 

 refers to the whole body, and every organ of the body, 

 as at first but an aggregation of colorless blood-cor- 

 puscles ; but in the very statement which would render 

 the identity alone explicit, the difference is quite as 

 plainly implicit. As much as this lies in the word " or- 

 gans," to say nothing qf "human." The cells of the 

 " organs," to which he refers, are even then uninter- 

 changeable, and produce but themselves. The Ger- 

 mans tell us of the Keimblatl, the germ-leaf, in which 

 all these organs originate. This Blatt, or leaf, is three- 

 fold, it seems ; but even these folds are not indifferent. 

 The various cells have their distinct places in them from 

 the first. While what in this connection are called the 

 epithelial and endorthelial tissues spring respectively 

 from the upper and under leaf, connective tissues, with 

 muscle and blood, spring from the middle one. Surely 

 in such facts we have a perfect warrant to assert the 

 initial non-identity of protoplasm, and to insist on this, 



