86 SCIENCE PROGRESS 
publication. Kurajew! showed that the vegetable ferment 
papayotin possessed the same power of producing precipitates 
in albumose solutions. Later, another Russian observer, 
Sawjalow,? gave a fairly complete account of the various 
chemical properties of this body. Lawrow and Salaskin,? 
however, conceive this formation not to be a true regenerative 
process, nor a real example of synthetic action, and, further, 
hold that it is the result of digestion under what might be 
termed unfavourable conditions. Again, Herzog‘ and Volhard® 
believe that this so-called plastein formation is not the result 
of the action of rennin at all, but may be regarded as another 
example of the reversibility of reaction of proteolytic ferments 
(Herzog), or of pepsin (Volhard). As to whether it is due to 
pepsin or rennin does not seem to be of very great importance, 
especially as some of the more modern workers like Pawlow 
and Parastschuk® hold that the so-called peptic action and 
the so-called rennet action are merely two phases of action 
of one and the same ferment. 
Another theory of resynthesis was brought forward many 
years ago by Ott,’ Popoff,* and Brinck,® who held that albumoses 
and peptones injected into the stomach of a living animal, or 
of one just dead, are converted into protein bodies in the 
stomach wall. It was further asserted that the protein which 
was formed was serum albumen. Brinck put this action down 
as being brought about by a micro-organism, to which she gave 
the name of Micrococcus restituens. 
Hofmeister, as I have already mentioned, held that on 
absorption the peptone was taken up by the leucocytes, and 
then, either through their agency or through that of the 
adenoid tissue, it is converted into cell protoplasm. Heiden- 
hain denied this hypothesis, but both he and Shore” held to 
Kurajew, Hofmeister’s Archiv, 1, 1901, 121. 
Sawjalow, Pfliger’s Archiv, 85, 1901, 171. 
Lawrow and Salaskin, Zezt. f. physiol. Chem. 36, 1902, 277. 
Herzog, Zeit. f. Dhysiol. Chem, 39, 1903, 305. 
Volhard, Munch. med. Wochsch. 50, 1903, 2129. 
Pawlow and Parastschuk, Zez¢. f. physiol. Chem. 42, 1904, 415. 
Ott, Archiv f. Physiolog. 1, 1883. 
Popoff, Zeit. f. Biol. 25, 1889, 427. 
Brinck, Zezt. f. Biol. 25, 1889, 453. 
Hofmeister, Schmiedeberg’s Archiv, 22, 1887, 306. 
Shore Journ. of Physiology, 11, 1890, 528. 
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