REVIEW OF BIOLOGY. 
57 
sis— [By MM. Arloing and Demarest). —Impregnation of tis¬ 
sues with complete cultures of bacillus of Kberth with filtrated 
toxine or with the serum of immunized subjects, when it is done 
before or after inoculation of bacilli of Koch, cannot prevent 
tuberculization of guinea-pigs. However, when done before 
the tuberculous inoculation, impregnation by serum seems to 
have increased in a small proportion the resistance of guinea- 
pigs to tuberculization. The ideas of practitioners who admit 
the antagonism between the two diseases are not supported by 
experimentation. Yet, it is not impossible that a period of 
arrest or a certain improvement may have been observed in 
some patients suffering with typhoid fever, if their serum had 
acquired properties analogous to those that exist in the serum 
of individuals artificially immunized.—( Soc. de Biol.) 
Rebuilding Serotherapy with Serum of Milk— [By 
M. Leveboullet). —It is principally by the salts it contains that 
the new product acts. Hypodermic injections of the serum, 
harmless to the skin, have no toxic influence on healthy or dis¬ 
eased organisms, and can attenuate or even cure the diseases 
characterized by severe organic debility. It stimulates vital 
force and assists in protecting the organism against infectious 
agents. The serum of cow’s milk is a thin fluid, slightly 
greenish but transparent. It contains 7 to 8 grammes of 
mineral salts to the litre. To prepare it, the milk is coagulated 
with pepsine while heated at 40 or 50°. After six hours cool¬ 
ing off, the clot is thrown on a thin, fine cloth. The sweet 
milk is filtrated, neutralized with soda, when a deposit takes 
place, and isolated by filtering through animal charcoal. 
The fluid which passes is then filtered again and put in glass 
tubes. Introduced under the skin, it is absorbed as quick as 
water is. No mark of the injection is left if the operation is 
well done; the operation can therefore be repeated many 
times on the same spot. I11 man the dose varies between 5 and 
25 c.c.— [Acad, de Med.) 
Normal, Presence of Arsenic in Animals—its Local¬ 
ization in Some Organs— [By M. Ar. Gautier). —The 
author has by most minute observations found that arsenic is 
constantly present in the thyroid gland of man, dog, pig, sheep, 
etc. It is never, or, in imperceptible doses, in the other organs, 
except the thyroid gland and the brain. In man he found 
o m. ge. 73 of arsenic in 100 grammes of thyroid gland. This 
small quantity is sufficient for the execution of a function 
which, though still unknown, is important. No thyroid with- 
