614 EXPERIMENT STATION RECORD. 



The precipitation of lead from clarified wine and must, A. 



BorvNTRAGEii {Ztschr. angew. Chem., 1^91, No. is, pp. 5r,i-f,59; No. 

 19, pp. 580-591). — The author lias coiitimied his work on this subject (E, 

 S. 1*., 0, p. 375) and compared sodium carbonate and sodium sulphate 

 as reagents for removing the lead from clarified wine and must pre- 

 paratory to estimating the sugar by titration. In addition to the objec- 

 tions which the author has previously made to the use of sodium 

 carbonate ft)r this ])urpose he calls attention to the yellow color which 

 results from its use. Preference is given to sodium sulphate. He also 

 finds that only a slight error is caused by the volume of the lead pre- 

 cipitate with the organic acids.— w. D. bigelow. 



Aerometric wine analysis, Sidersky [Rev. Gliim. analyt., 2 (1894), 

 p. 181; ahs. in Chem. Ztg., 18 {1894), No. 70, Bepert., p. 314).— The per- 

 centage of alcohol and extract are calculated from the specific gravity 

 of the wine, and of the residue left after boiling off the alcohol diluted 

 with water to the original volume. — w. D. bigelow. 



Proceedings of the eleventh annual convention of the Asso- 

 ciation of Official Agricultural Chemists, H. W. Wiley ( U. 8. 

 Bept. Agr., Bivisiou of Chemistry Bid. 4o, pp. 403). — This is the report 

 of the convention held at Washington, 1). 0., August 23-25, 1891, an 

 account of which has already been given (E. S. K., 6, pp. 178-180). In 

 the latter account under " Soils and ash," p. 182, it is stated that " the 

 acid soluble materials are to be determined in this dry soil, the results 

 being reported on the air-dry basis." This should read: "The acid 

 soluble materials are to be determined in the air-dry sample and the 

 results calculated to the water-free basis." 



The full report contains the reports for 1893 and 1894 of the abstract 

 committtee of the association, including a large number of abstracts 

 of articles relating to the analysis of fertilizers, feeding stuffs, dairy 

 products, sugars, fermented liquorl^, etc. 



The oil of the black walnut, W. E. Stone {Agl. Sci., 8 {1894), No. 

 6-9, pp. 353, 354). — By means of pressure about 19 per cent of oil was 

 obtained from the kernel of the black walnut. Extraction with ether 

 showed 55 per cent. The oil was of a pale straw color with a iaint 

 but agreeable taste and odor. Alter standing six months it remained 

 free from unpleasant taste or odor. It was found to belong to the class 

 of "drying oils." Its chemical and physical properties are described: 

 "One of the valuable properties of the oil of the English walnut is its 

 adaptation to the manufacture of an exce])tionally fine varnish. So 

 far as can be ascertained short of a practical test, our black- walnut 

 oil possesses all the properties for a similar application and undoubt- 

 edly is capable of many practical uses should occasion demand." 



The determination of nitrogen in urine according to Scheider-Seegen, F. 

 VoiT {Ztschr. Biol., 31, p. 168; ahs. in Ztsvhr. analyt. Chem., 34 {1S95), No. 1, p. 1:21). 



Chemical investigations of the slimy liqtxid -which forms in distilled wrater, 

 A.. Goldberg {Zwolfter Ber. Naturw, Ges. Chemnitz, pp. 56-67). 



