180 EXPEEIMENT STATION EECORD. 



VETERINARY MEDICINE. 



Book of veterinary doses, therapeutic terms, and prescription writing, 

 P. A. Fish {Ithaca, N. Y., 1912, 4. ed., rev. and enl., pp. 185). — A fourth revised 

 and enlarged edition of this pocket guide. 



On the distribution of arsenic in the animal organism, Schilling and 

 Naumann {Arch. Schitfs u. Tropen Hyg., 16 {1912), No. I,, pp. 101-109; abs. in 

 Sleeping Sickness Bur. [London] Bui., It {1912), No. 35, irp. 103, 104).— In the 

 investigations here reported arsenopbenylglycin was administered to normal 

 rabbits and to rabbits infected for a longer or shorter time with nagana. Each 

 animal received a given dose and after a period of 24 or 48 hours was killed. 

 The conclusions drawn are as follows : 



" Twenty-four hours after intravenous injection the greater part of the arsenic 

 is circulating in the blood. An infected rabbit excreted less arsenic than a non- 

 infected rabbit. The blood serum contains considerably more arsenic than the 

 blood clot. It is to be assumed that the blood cells of the circulating blood do 

 not withdraw from the plasma any appreciable quantity of arsenic. 



" The arsenic content of the organs varies apparently in an irregular manner. 

 Absolutely, as v\'ell as relatively, the quantity of arsenic found is least in tlie 

 brain and spinal marrow. Of the abdominal organs the kidneys contain rela- 

 tively the most and the liver the smallest quantity of arsenic (5 out of 6 cases). 



" If one takes into account the blood contained in the organs, by subtracting 

 the arsenic contents of this from the arsenic found in the organs one gets the 

 following results : The splenic cells always contain relatively large quantities 

 of arsenic. Then follow the kidney cells. The arsenic content of the liver cells 

 fluctuates within wide limits; it is always under that of the spleen and kidneys. 

 The cells of the brain and spinal cord are free from arsenic." 



Stock poisoning by larkspur, C. D. Maesh {Proc. Amer. Nat. Live Stock 

 ^ Assoc, 15 {1911), pp. 69-77). — In the author's investigations it was found that 

 cattle were never poisoned when they ate less than 30 lbs. of larkspur per 1,000 

 lbs. weight of the animal. An equal quantity of either the tall or low larkspur 

 was required to produce the toxic effect. Cattle on the range were rarely 

 poisoned by tall larkspur after the first week in July, whereas the low lark- 

 spur was poisonous from the time it starts in the spring until the flowers drop 

 from it the first of July, it being a little more poisonous about July 1 than at 

 any other time, due to tlie fact that the seeds are somewhat more poisonous 

 than the other parts of the plant above ground. In experiments with horses it 

 was found possible to get them to feed on larkspur, although on the open 

 ranges they never eat it in any large quantity. It is stated that sheep feed on 

 larkspur very readily and actually grow fat upon it, without the slightest harm. 



It was found with experimental animals that where remedies were not 

 applied about half of the affected animals recovered. It is stated that a remedy 

 which results in the recovery of about 96 per cent of the affected animals has 

 been found, a description of which will be published in a forthcoming report. 



The regional lymph glands of food-producing animals, J. S. Buckley 

 and T. Castob {U. S. Dept. Agr., Bur. Anim. Indus. Rpt. 1910, pp. 371-JiOO, pis. 

 S, figs. 12; Circ. 192, pp. 371-JiOO, pis. 3, figs. 12). — This paper deals with the 

 topographical anatomy of the lymphatic apparatus of food-producing animals. 



" It is regrettable that a more absolute knowledge does not exist of the ana- 

 tomical detail of this system in the various food animals, but an endeavor has 

 been made to supply as much as possible of the general knowledge that could 

 be gleaned from the various works that treat of this subject, together with a 

 fair amount of original investigation carried out by the writers of this paper." 



