302 PHARMACOGNOSY [BoT. Absts., Vol. VII, 



2104. Pammel, L. H. Hogs poisoned by young cockleburs. Amer. Jour. Vet. Med. 15: 

 385-386. 1920. — This is an account of the deaths of some hogs, presumably from eating 

 cocklebur, with remarks on cocklebur poisoning. — C. D. Marsh. 



2105. Pammel, L. H. Poisoning from silage and moulds. Amer. Jour. Vet. Med. 14: 

 605-606. 1919.— Attention is called to the fact that certain fungi are pathogenic and others 

 produce toxic substances so that there is always danger in feeding moldy forage. — C. D. 

 Marsh. 



2106. Pammel, L. H. Suspicious poisonous weeds. Amer. Jour. Vet. Med. 15:384-385. 

 1920. — A brief account is given of Lactuca canadensis, Oxybaphus nyctagineus, and Lactuca 

 scariola.-r-C. D. Marsh. 



2107. Sheppard, Philip A. E. African aboriginal therapy. Amer. Jour. Public Health 

 10:227-235. 1920. 



2108. Wallis, T. E. Analytical microscopy, IX. Pharm. Jour. 105: 376-378. Fig. 20-21. 

 1920. — Microsublimation of active principles of plants and microchemical precipitations in 

 plant cells are discussed. — E. N. Gathercoal. 



2109. VAN DER WiELEN, P. On the cultivation of Chenopodium ambrosioides anthel- 

 minticum. [From Onze Tuinen Aug. 17, 1920.] Chem. & Druggist 93:1334. 1920.— The 

 discovery in 1912 that the oil distilled from the seed of this plant was a most effective remedy- 

 in ankylostomiasis (hookworm disease), has resulted in a world-wide demand. The principal 

 source has been from cultivation near Baltimore. Recently its cultivation in Delhi and else- 

 where in the Dutch East Indies and in Holland has proven very successful. The oil produced 

 appears to be fully equal to American oil. — E. N. Gathercoal. 



2110. WiLMOT, F. C, AND G. W. Robertson. Senecio disease. [Taken from South 

 African Med. Rec] Jour. Amer. Med. Assoc. 75: 1524. 1920.— In 1918 sickness of obscure 

 causation, accompanied by abdominal pain and vomiting, occurred in the George district of 

 Cape Province, South Africa. The disease was shown to be due to meal and bread contain- 

 ing the seeds and portions of the plants of Senecio ilicifolius and Senecio burchelli, weeds in 

 the wheat fields of that vicinity. — Win. B. Day. 



2111. Yoxjngken, H. W., AND G. A. Slothower. Rhus venenata DC. Amer. Jour. 

 Pharm. 92: 695-701. Fig. 1-4. 1920.— A histological study of the stems and leaves of Rhus 

 venenata with some observations on the poisonous constituent. The resin canals of the stem 

 'Which extend from the bast region and penetrate the medullary region, where they end blindly, 

 are narrow-branching vessels, filled with a dark, reddish-brown substance of a resinous 

 nature. This resinous substance did not respond to the gummy lignin tests (Youngken) as 

 applied to the stems of the Myricaceae. It did however, upon treatment with alcoholic potash, 

 form a nigrescent compound, a reaction characteristic of the poisonous substance causing the 

 dermatitis produced by the poisonous species of Rhus. — In the study of the leaf non-glandu- 

 lar, unicellular, and uniseriate hairs were noted in the dorsal region, many of which con- 

 tained the resinous substance responding to the nigrescent reaction. Resin canals were 

 noted in the vascular bundles but not in the mesophyll. To account for the presence of the 

 resin in the hairs the authors are inclined to believe that it may be a direct product of the 

 protoplasm. A series of successive extractions was made with petroleum ether, alcohol and 

 water respectively. The poisonous principle was extracted with the petroleum ether. This 

 extract applied to the inner forearm produced in 24 hours inflammation with violent itching 

 and in 36 hours vesication. — Anton Hogstad, Jr. 



