yirchow’s cellular pathology. 101 
then should the generation of cells, from the very plasma that 
they aruinade of, be* called spontaneous generation ? HO; this 
question is to be decided by facts and not by theories. And we 
proceed to adduce some facts in favor of what has been called 
free cell development. We quote first from Yogel : “According to 
Schwan, development is always dependent on a formation of 
cells in an amorphous, fiytoblastema.” We need not quote what 
he says of the process of this formation. He states the fact and 
that is enough for ms. He goes on to say that, from these 
*eells all organized products are formed. Again he says, “a 
very accurate set of experiments recently submitted by Dr. 
Helbert to our Physiological Institute, gave a singularly strik- 
ing proof of this tendency. Fresh plasma taken from beneath 
an ordinary blister plaster exhibited nq corpuscles of any kind. 
After standing in a glass for five or six hours, minute corpuscles 
were formed exactly analogous to those which appear in plasma 
when the formation of pus commences. Repeated experiments 
invariably gave the same results.” Here observation first showed 
the amorphous fluid and afterwards the formation of incipient 
pus corpuscle. According to Aeherson, whenever fat and albu- 
men. .av^mu^ed Jiud. quote** 
from Kolliker, page 41: “Whenever fluid fat and fluid albumen 
are shaken together, -the fat globules which are always formed, 
become surrounded by an albuminous coat.” If fat and albumen 
outside of the body can form vesicles or cells (and this is a fact) 
it requires no great stretch of credulity to believe that cells cln 
be formed in a freshly exuded blastema in immediate contact 
With the living organs. 
We quote again from Kolliker, page 43 : “ With*regard to 
the development of cells, we have to distinguish between their 
free origin and their production by the intermediation of other 
cells. In the former case the cells are developrd independently 
of others in a plastic fluid. The cytoblastema of Schleiden, con- 
taining chiefly protein, fat and salts in solution ; in the other or 
in cell multiplication the existent cells produce the so-called 
secondary or daughter cells within themselves, or multiply by 
division— endogenous cell formation, and fissiparous cell forma- 
tion. 
W e see that Kolliker recognizes the fact that cells are multi- 
plied by fissiporous generation, that which is almost exclusively 
contended for by Yirchow, yet as a fact contends that they 
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