No. 2, September, 1921] 



PH ARM ACOG NOSY 



153 



Purshianus seedlings, planted some years ago in East Lothian, Scotland. The plants have 

 not developed into trees, but retain rather the bushy habit of growth. They are now about 9 

 feet high. Some 2 years ago bark was peeled from a number of branches, dried, and made into 

 the official fluid extract. The latter possessed the full therapeutic value of the best North 

 American Cascara sagrada. It would be quite feasible to grow and harvest this drug in 

 Scotland. — E. N. Gathercoal. 



984. McNair, James B. A study of Rhus diversiloba with special reference to its toxicity. 

 Amer. Jour. Bot. 8: 127-146. PI. 1, fig. 2. 1921. — The author discusses the taxonomy of this 

 species, particularly its relationship to R. toxicodendron, and outlines the distribution of the 

 species. — The fresh sap emulsion secreted by the resin canals is apparently the only portion 

 of the plant which causes poisoning of the skin (dermatitis). Those parts of the plant which 

 do not possess canals, — the anthers, pollen, xylem, epidermis, cork cells, and trichomes, — 

 are therefore non-toxic. The virulency of the plant in its different growth stages is dis- 

 cussed. — E. W. Sinnott. 



985. Marsh, C. Dwight, A. B. Clawson, and W. W. Eggleston. Baccharis pteronioi- 

 des as a poisonous plant of the Southwest. Jour. Amer. Vet. Med. Assoc. 57: 430-434. Fig. 

 1-2. 1920. — Suspicion has been thrown on Baccharis ■pteronioides as a possible cause of some 

 losses of live stock in the Southwest [U. S. A.]. Feeding experiments have shown the plant 

 to be poisonous to sheep, and it may be presumed that it will affect cattle in a similar way. 

 A short description of the plant is given. — C. D. Marsh. 



986. Pammel, L. H. Equisetosis or horsetail poisoning. Vet. Med. 16: 43. 1921. — A 

 report is made of a case of horse poisoning, with additional data, mostly from Pammel's 

 manual. — C. D. Marsh. 



987. Pammel, L. H. Some forms of lima beans poisonous. Vet. Med. 16: 45. 1921. — 

 A distinction is made between lima beans, some varieties of which are poisonous, and butter 

 beans, which are not poisonous. — C. D. Marsh. 



988. Pammel, L. H. Three-flowered nightshade poisonous. Vet. Med. 16:46-47. 1921. — 

 An account is given of the fatal poisoning of 2 horses, with details of the symptoms and 

 autopsy findings. — C. D. Marsh. 



989. Pammel, L. H. Will frosted Sudan grass produce poisoning? Amer. Jour. Vet. 

 Med. 15: 27. 1920. — In reply to this query the author briefly discusses the subject. — C. D. 

 Marsh. 



990. RamIrez, Roman. Drimys mexicana Sesse et Moc. Rev. Agric. [Mexico] 4: 

 426. 1 fig. 1919. — The cultivation of Drimys mexicana Sess^ et Moc, the bark of which is 

 used for medicine, is discussed. — John A. Stevenson. 



991. Spokes, Ray E. American styrax. Jour. Amer. Pharm. Assoc. 9: 1055-1060. 

 1920. — A study of American styrax collected in the vicinity of Atlanta. The American styrax 

 was found to be of firmer consistency than the South American product, in this respect re- 

 sembling European styrax. The author reports the following analyses: 



U. S. p. STANDARD 



Incineration residue 

 Acid value 



Undissolved residue. 

 Cinnamic acid (free) 



Resin esters 



Styrol 



Not more than 1 per cent 



Not more than 86 



Not less than 56 



Not more than 2.5 per cent 



Saponification value 



Not more than 2.30 



Not less than 170 



