No. 3, October, 1921] PHARMACOGNOSY 257 



gav^e excellent results in preventing scab {Cladosporium carpophilum). In a comparison of 

 dusting and spraying for the control of peach scab, the dust mixture was practically as 

 efficient as self-boiled lime-sulphur in the control of scab. — E. C. Auchler. 



1569. HuNGERFORD, Chas. W. A modification of the concentrated formaldehyde method 

 of seed treatment. Phytopathology 11: 149-150. 1921. — A formaldehyde solution (1 part 

 formaldehyde to 10 parts of water) is sprayed upon the grain. — B. B. Higgins. 



1570. Reddick, Donald. Status of dusting in orchard protection. Proc. Amer. Pomol. 

 Soc. 35: 162-172. 1917 [1919]. — An account of the early history of spraying and dusting is re- 

 corded. A brief history and description of dusting work done upon other crops and in other 

 states are given. The author concludes that the future possibilities of dusting as a method of 

 orchard protection cannot be predicted at this time. — E. C. Auchter. 



1571. RiEHM, E. Ein empfehlenswerter Reizapparat. [An excellent steeping apparatus.] 

 Illus. Landw. Zeitg. 41: 4. 1 fig. 1921. — A description, with diagram, is given of a very 

 elaborate apparatus for the treatment of seed wheat (l) with water for the separation of many 

 diseased grains, and (2) with formaldehyde as a preventive of stinking smut iTilletia spp.). 

 Provision is also made for the subsequent drying of the seed. — John W. Roberts. 



1572. Thurston, H. W., Jr. A note on the corrosive sublimate treatment for the control 

 of Rhizoctonia. Phytopathology 11: 150-151. 1921. — Data are given on the growth from 

 Rhizocionia sclerotia taken from Irish potatoes treated with solutions of corrosive sublimate 

 for various lengths of time. — B. B. Higgins. 



MISCELLANEOUS (COGNATE RESEARCHES, TECHNIQUE, ETC.) 



1573. Etter, Bessie E. Field cultures of wood-rotting fungi on agars. Phytopathology 

 11: 151-154. 1921. — The equipment needed, the media used and the method of packing it 

 for shipment, and the results from a large number of inoculations are given in detail. — B. B. 

 Higgins. 



1574. Godfrey, G. H., and R. B. Harvey. Motion pictures of zoospore production in 

 Phytophthora. Phytopathology 11: 145-146. PL 6. 1921. 



1575. TiLLEY, F. W. Phenol coefficients. Amer. Jour. Public Health 11: 513-519. 1921. 

 — Phenol coefficients vary with the source of peptone used and with the hydrogen-ion concen- 

 tration of the culture tested. They also vary with different organisms. The coefficients are 

 determined in the absence of organic matter and so are of little value where the disinfectants 

 are intended for use in its presence. Disinfectants should be tested under conditions simulat- 

 ing as closely as possible those under which they are to be used. It is more important to 

 determine effective concentrations than to determine phenol coefficients. — C. A. Luduig. 



1576. Villedieu, G., et Mme. [Villedieu.] De la non-toxicite ducuivrepourlemildiou. 

 [Concerning the non-toxicity of copper for mildew.] Compt. Rend. Acad. Sci. Paris 172: 335- 

 336. 1921. — A very delicate test for copper is developed by using 100 cc. of a solution contain- 

 ing 2 drops of potassium ferrocyanide and 4 drops of acetic acid. By this test it is found that 

 copper is not involved in the toxic effect of various solutions applied to fungi. — C. H. Farr. 



PHARMACEUTICxVL BOTANY AND PHARMACOGNOSY 



Heber W. Youngken, Editor 

 E. N. Gathercoal, Assistant Editor 



(See also in this issue Entries 1107, 1113, 1182, 11%, 1197, 1198, 1202, 1205, 1207, 1210, 



1211, 1256, 1682) 



1577. Anonymous. Jalap production in Mexico. Pharm. Era 53: 75-76. / fig. 1920. — 

 Temporary cessation in the production of Jalap is due to the earthquake of January 3, which 



