298 EXPERIMENT STATION RECORD. 



other 2 gave evidences of infectiuu. In 1 the lymph sac contained a reddish exuda- 

 tion and the spleen was swollen. In the other the liver was much enlarged and 

 covered with numerous minute white spots. In the fourth experiment material was 

 taken from one of the frogs in the last-mentioned experiment and was inoculated 

 into 2 frogs and 1 guinea pig. The frogs were kept at the ordinary temperature of 

 the room. Both frogs died, one 4 days and the other 15 days after infection. The 

 guinea pig was killed about 8 weeks after the inoculation and a post-mortem exam- 

 ination showed that it had not become infected. 



Observations and studies on a disease of the extremities observed in young' 

 cattle in South America, 0. Voges (Ci'nthl. Bal-t. u. Far., 1. Aht., SI {190J), Xo. 4, 

 Orig., pp. 136-141). — A report was made on a disease of cattle of quite wide distri- 

 bution in South America. A most characteristic symptom is a striking lameness in 

 one leg, the lameness being due to an inflammatory swelling, which later develops 

 into a large suppurative abscess, involving a considerable portion of the extremity. 

 The author attempted to isolate the pathogenic organism from the pus contained in 

 such abscesses. A number of suspected organisms were cultivated and inoculation 

 experiments were made, without success in demonstrating the causal relationship 

 of any of them to the disease. No attempt was made to devise a serum treatment 

 since it was found that a much less expensive remedy might be used. If the abscess 

 is thoroughly opened and drained a prompt recovery takes place in all cases. 



Carcinoma of the eye in cattle, O. Voges {Centbl. Bali. u. Far., 1. Aht., 31 

 [1903), No. 4, Orig., pp. 143-14o,fig. 1). — Brief notes on the symptoms of this dis- 

 ease, together with a description of the appearance of the infection to the naked eye 

 and the microscoj^ic changes produced in the diseased tissues. The disease aiii3ears 

 to be confined to pure-bred cattle, esi)ecially to the Hereford. 



Study of sorghum poisoning in cattle, X. Peters {Nebraska Sta. Rpt. 1901, pp. 

 50-54)- — On account of the numerous complaints received from farmers whose stock 

 had been poisoned by eating sorghum, the author made a special effort to ascertain 

 the circumstances surrounding such cases and to observe the symptoms and study the 

 disease more carefully. In one case 15 cattle accidentally broke into a field of sor- 

 ghum, where they remained 20 minutes; 3 of these cattle became sick and died within a 

 few hours. Other similar cases of poisoning from sorghum are related. An experi- 

 ment was tried, during which 2 young cattle were turned into a sorghum field. Only 1 

 of the animals ate any appreciable c^uantity of sorghum, and this animal was so badly 

 affected that it fell to the ground within 10 minutes after entering the field. While 

 in a recumbent position peculiar twitchings of the muscles in various parts of the body 

 were observed. There was a partial paralysis of the tongue and increased salivation. 

 The animal was finally killed when it was apparent that it would soon die, and a 

 post-mortem examination revealed the fact that it had eaten 1^ lbs. of sorghum 

 leaves. In this case, as well as in 11 other post-mortems, the author was not able to 

 observe any evidence of sorghum leaves having become adherent upon the entrance 

 of the trachea, so as to cause strangulation. In the cases thus far mentioned, poison-' 

 ing was due to eating standing green sorghum. A few cases are reported of poisoning 

 from eating sorghum several hours after it was cut. It is recommended that one 

 animal be turned into the sorghum field first, and that others be allowed to enter if 

 no symptoms of poisoning are observed in the first one. In this way serious cases 

 of poisoning may l)e avoided to a great extent. 



A study of the enzyms of green sorghum, H. B. Slade {Nebraska Sta. Fpt. 

 1901, pp. 55-62). — The author worked in connection with A. T. Peters in an investi- 

 gation of the cause of sorghum poisoning (see above). Analyses were made of stalks 

 of sorghum about 2 ft. high, in a vigorous growing condition. Extracts were obtained 

 from such material, both in water and in a solution of common salt, which exercised 

 more or less action upon starch. The action thus produced varied to a considerable 

 extent, according to the part of the jilant from which the extract was obtained and 



