64
FORMATION OF DEFENSIVE FERMENTS
extraordinary property possessed by the animal organism of responding with certain typical symptoms to a second injection of the same material as was used in the first injection. A certain time elapses—in the case of a guinea-pig, about fifteen to twenty days—before this state is overcome.
Fig. 3.
(a) 1 c.c serum.
- 0.5 c.c. of a 10 per cent. silk-peptone solution.
- 5 c.c. normal salt solution.
(b) 1 c.c. serum at a temperature of 60º.
- 5 c.c normal salt solution.
(c) 1 c.c serum.
- 1 c.c of a 1 per cent. gelatine solution.
- 4.4 c.c normal salt solution.
Cramp can be observed within different groups of muscles, as well as a sudden fall of temperature, &c. Peptones also can be demonstrated in the blood after reinjection of the original protein. Various authors have supposed that anaphylaxy is directly connected with the production of derivatives of proteins, particularly peptones, without, however, having
