Thanking you in advance, I remain
Sincerely yours,
Karl von Ruck.
NOTE TO [PAGE 75].
... One unpleasant possibility [in the making of inoculation] is to be mentioned, one which I did not originally think of and which was called to my attention by Ober-med. Rath Lorenz. It consists in the general collapse of the inoculated calf, of very threatening aspect, when the inoculating fluid has been injected too cold. This happened on a Hessian farm on a cold winter day, and resulted in the collapse of all the inoculated calves. (It would, by the way, have happened if only the cold fluid without the virus had been injected.) As it was, all the inoculated animals had recovered by the following day. This teaches us to warm the inoculating fluid to about body temperature before injecting it. This is readily done by placing the bottle containing the fluid into a little lukewarm water.
FOOTNOTES:
[1] Address delivered at the seventy-fifth meeting of Naturalists and Physicians in Cassel, September 25, 1903.
[2] On the other hand, certain stages in the development of various malaria parasites resemble each other very closely; but we distinguish the parasites definitely because they are of different origin.
[3] Formula for the digesting fluid:
| Pepsin | 1-2 gm. |
| Glycerin | 10 c.c. |
| HCl 22° Baumé | 10 c.c. |
| Sodium fluorid | 3 gm. |
| Distilled water | 1000 c.c. |
[4] The intestine reckoned from the pharynx down through the stomach to the rectum. See appendix, [p. 81].—Translator.