402 Reviews and Records in Anatomy and Physiology. 
and therefore that his structures are but greater or less variations 
forms through which her different organic conditions are mani- 
fested ; thus, nervous tissue is the same, essentially,. wherever 
found in the animal kingdom, whether in the plant-like polyp 
or in man. he same may be said of other tissues, and when 
the student of structure has fairly seized hold of such grand facts, 
he has proceeded not a little way on his course. 
We cannot think of taking up any special portion of the work 
of Kélliker before us, not even ina general way, and quotations 
from so succinct a treatise would mar the sense and convey little 
meaning. Much, however, that is new and of special interest will 
be found under the head of development of each tissue or struc- 
ture, for here Kélliker has shown himself particularly original and 
proficient. This is especially true of the nervous system, where 
e is a fullness of detail commensurate with the importance of 
the subject. 
We look with more than ordinary interest for the appearance of 
the first volume of this encyclopzedian work ; but as it must com- 
prise subjects which are yet hardly ripe for a satisfactory discus- 
sion, we would not ask its too early issue. We refer here to that 
debatable ground, ced/s and cel/ doctrines. Not satisfied, ourselves, 
of the universality of the application of Schwann’s doctrines in 
this respect, and having, moreover, carefully traced the features 
of a new mode of cell-genesis essentially dissimilar from that 0 
Schwann, there is some personal concern attached to this subject. 
But untied from any special theory, we shall be more than please 
if the distinguished Wurtzburg Professor is able to reconcile these 
dissimilar conditions of the science, and clearly show asingle and 
universal mode of cell-genesis,—a unity, which, from the very 
correlative constitution of the human reason to the conditions of 
organization, the mind seeks and longs for in an earnest and 
almost prophetic manner. — 
