108 EXPERIMENT STATION RECORD. 



The elementary analysis and calorimetric value of the muscle substance 

 of various animals, A. Koulek {'/Ai^clir. I'lufsiid. Cltcnt., -U, pp. 4^9-')19; aha. in 

 Clu'iii. Ciiilh/., I'JOI, I, No. IS, p. 752). — The carbon, hydrogen, nitrogen, sulphur, and 

 oxygen content and the calorimetric value of the tiesh of cattle, Hwiiie, Hheej), dog, 

 chicken, and hortJe are given. 



Determination of starch in liver sausage, K. Hefelmann {Ztac.hr. Oeffentl. 

 Vlirni., 7, pp. 4-3-47; cOm. in Chi'in. CentbL, 1901, I, No. 12, j'P- 707, 708). 



Fluorescein as an indicator, H. Zellner {Fharm. Ztg., 4^ {1901), p. 100; ahu. 

 in Uit-iii. Ztij., 25 {1901), Xo. 14, }>■ 40). — Fluorescein is used as an indicator in esti- 

 mating ammonia. It is prepared by dissolving 0.4 gm. in 50 cc. alcoliol and adding 

 30 cc. water. 



The determination of ammonia in the air of stables, A. P.V(;noui. (*J1iiI. Sin. 

 Aijnm. Pas <h- (hhii.'f, 1900, pp. 5-S, 29-o2, fir/. 1). — A description is given of an aspi- 

 rator arranged to draw a definite volume (2 liters) of air through 10 cc. of acidulated 

 ammonia-free distilled water in a Nessler tube. The ammonia is determined by 

 means of Nessler's reagent. 



Report of analyses of Paris green and other insecticides in 1900, J>. L. 

 Van SLYKEand W. H. Andrews {New York SUde'Sla. Bid. 190, pji.2S.3-290). — Anal- 

 yses were made of 22 samples of Paris green and 1 sample eat^h of Arsenoid, Para- 

 grene, Black Death, Bug Death, and Hammomrs Slugshot. In the 22 samples of 

 Paris green the arsenic content varied from 55.<S3 to 60.8 per cent, and averaged 57.05 

 per cent. Tlie amount of arsenious oxid solul)le in water in the different samples 

 ranged from 0.51 to 15.69 per cent and averaged 1.68 per cent. The amount of cop- 

 per in the 22 samples avei-aged 28.97 per cent. Microscopic examination for testing 

 the purity of Paris green was not found satisfactory. The results ol)taineil from tiie 

 study of the different samples of Paris green indicated that this substance was sold 

 in a satisfactory condition. The chemical analysis of the other insecticides is 

 tabulated. 



Analyses of Paris green and other insecticides, C. A. Goessmann {Mcuf-snchu- 

 scl1.'< Ilotrh ,Sta. Bui. 74, l>p- 7-9). — Analyses of 14 samples of Paris green an<l one each 

 of pink arsenoid (lead arsenite) , green arsenoid (copjier arsenite), white arsenoid 

 (barium arsenite). Laurel green, and Bug Death are reported. 



Soluble arsenious oxid in Paris green, S. Avery and H. T. Beans {Jour. Ainer. 

 Chon. Soc, 2-i {1901), No. 2, pp. 111-117). — In this preliminary report it appears 

 from the results of the experiments that the method of estimating the arsenious oxid 

 in Paris green by suspending in 1,000 parts of water for 1 week is quite arbitrary. 

 The use of a strong solution of sodium acetate seems to be a better solvent than 

 water. The authors believe, however, that too much importance is attached to the 

 content of "soluV)le arsenious oxid" in Paris green. 



The iodometric estimation of arsenic acid, F. A. Goocii and Julia C. Morris 

 (('hem. Neirs, S.J (1901), No. 214>!, }>p. 15-17). — The authors show that an arbitrary 

 correction of aljout 0.003 gm. must be deilucted from the indications in Williamson's 

 process of direct titration with thiosulphate; and a correction varying from one- 

 half that amount to nothing, according to theamount of arsenious acid present, when 

 determination is made by iodin after neutralization with acid potassium carbonate. 

 In the vaporization process the application of an arbitrary correction is unnecessary. 



Detection of arsenic in the presence of sulphites, J. F. Smith (Chem. News, 

 83 (1901), No. 2145, pp. 2, .?).— A modification of :Marsh's test. By this method 15 

 parts of arsenic in 1,000,000 were detected in the presence of a large (juantity of 

 l)isuli)hite in 5 cc. of beer without previous treatment. 



The detection of arsenic in beer and bre-wing materials, A. C. Chap.man 

 {Anali/.'<l, 26 (19(il), No. 298, pp. 8-10). — l^.y this method the presence of arsenic is 

 determineil l)y Ijoiling a solution in which a j>iece of ])right copper gauze is sus- 

 pended. 



