702 EXPEKIMENT STATION RECORD. 



of silica but rather to some organic substance thus far undetermined. The plant 

 appears to be especiall)' dangerous to cattle, and only rarely affects horses. Notes 

 are given on the anatomical characters, distribution, habit of growth, and means of 

 combating this species. With regard to treatment of poisoned animals, it is recom- 

 mended that all animals that show symptoms of poisoning by this plant should be 

 immediately removed to pastures where the plant does not grow, and that treatment 

 should be applied according to the symptoms which are manifested. 



Screw worm in cattle at St. Lucia, TI. Maxwell-Lefroy {Imp. Dept. Agr. West 

 Indiex, Pamphlet No. 14, 1U02, pp. 13). — This bulletin contains an account of the life 

 history, mode of attack, injury, and means of combating screw-worm attacks upon 

 cattle. The insecticides which are reconnnended for killing screw worms are carlwlic 

 acid and sweet oil, carbolic acid alone, Jeyes' fluid, spirits of turpentine, tar, and fish 

 oil. The author recommends that an effort be made to locate the breeding placies of 

 the screw flies, and that the flies be destroyed in such localities. 



Sour grass and ticks [Agr. News [Barbados'], 1 {1902), No. 7, p. 105, fig. 1). — 

 01)ser\-ations are reported on Andropogon pertusus. It is claimed that horses and 

 cattle that graze upon this grass are remarkably free from infestation by ticks and 

 other insects, and this is explained by assuming that the sour grass contains a 

 volatile i)rincii)le which is excreted through the skin and which is offensive to ticks. 



Treatment of Strongylidae in the stomach and intestines of sheep, Moussu 

 and Makotel {Rec. Med. Vet., Paris, 8. ser., 9 {1902), No. 12, pp. 292-298) .—The 

 authors prefer the term gastrointestinal strongylosis for the affection produced by 

 the presence of species of Strongylus in the stomach and intestines. In treating 

 cases of this disease the authors obtained best results from feeding 2 to .3 gm. of 

 areca nut mixed with bran to each sheep, according to size. It is reconnnended 

 that the stal)les and other quarters be disinfected with (pncklime, solutions of 

 sulphuric acid, or sulphate of iron. 



Frogs, toads, and carp (Cyprinus carpio) as eradicators of fluke disease, 

 C. W. Stiles {V. S. Dept. Agr., Bureau of Anliiad Inda.str!/ Rpt. 19()1, p\). 2.'0-222, 

 figs. 7). — Letters from E. N. Hutchinson, of Portland, Greg., concerning the value of 

 carp in eradicating the fluke disease are reproduced, and mention is also made of a 

 rejiort by W. II. Ashmead to the effect that frogs and toads have been int-nnhu'ed 

 into certain ponds in the Hawaiian Islands for the purpose of destroying snails which 

 serve as intermediate hosts of the flukeworms. It appears from these statements 

 that car]) may jirove to be of considerable value in this way. 



Results of the work against sheep scab in 1901, D. E. Salmon (U. S. Dept. 

 Agr., Bureau of Animal Industry Rpt. 1901, pp. 583-589). — Statistics covering tlie 

 year 1901 sliow that under the direction of the Bureau of Animal Industry 8S6,(i45 

 sheep were dipiied. It was found that 92.4 per cent of the total numl)er of sheep 

 inspected were free from scab. Of the whole number of sheep dipped during 1901, 

 51.2 per cent were treated with nicotin and sulphur, 34.8 jier cent with tobacco and 

 sulphur, and 13.9 per cent with lime and sulphur. A surprising effectiveness was 

 reported from 1 dipping with these preparations. Five stations reported perfect 

 effectiveness for lime and sulphur, 4 stations for tobacco and sulphur, and 3 stations 

 for nicotin and sulphur. From a comparison of tliese 3 dips for the years 1900 and 

 1901, it appears that nicotin and sulj^hur heads the list in effectiveness, followed by 

 tobacco and sulphur, and lime and sulphur. There appears, however, to be very 

 little choice l)etween these 3 dips. 



Sheep scab {Jour. Dej)t. Agr. and Teeh. Instr. Ireland, 2 {1902), No. 3, pp. 511- 

 514, figs. 2). — Notes are given on the symptoms, etiology, and treatment of this 

 disease. In outbreaks of sheep scab it is recommended that all affected and exposed 

 sheep be dipped twice, with an interval of 10 days between the dippings; a third 

 dipping may be necessary in some cases to render the treatment thoroughly effective. 

 The desirability is suggested of dipping all sheep twice a year, once after shearing 



