398 EXPERIMENT STATION RECORD. 



acid iu beer, wine, catsup, and other products. A. McGill, associate referee on 

 cereal products, referred to deflnitions of grain, flour, etc., and reported a 

 study of tlie literature on gluten, nongluten, nitrogen, valuation of flours, and 

 gliadin. Investigations on the determination of water iu foods were reported 

 by F. C. Webber, associate referee on this subject. 



The referee on the determination of nitrogen, J. B. Gibboney, reported 

 considei'able cooperative work on the determination of total and available 

 nitrogen by different methods. In connection with this i-eport J. P. Street 

 read a paper on the detection of peat in commercial fertilizers. It was be- 

 lieved that a pentosan determination will indicate the presence of as small 

 an amount of peat as 10 per cent. A report on the separation of nitrogenous 

 bodies in cheese was submitted by the reteyee, R. Harcourt. The results of 

 cooperative work on the extraction. of, ^yater-soluble and salt-soluble products 

 were included in the report. F. . C. Cook presented a report of investigations 

 on meat proteids. ' , ....,,,^,.;,.' 



Dairy products was reported upon by, . the^ref eree, F. W. Woll, and papers 

 on this subject by G. A. Olson and A. W. Bosworth were read. The latter 

 dealt with the determination of acidity in cheese. J. K. Haywood reported 

 upon feeding stuffs, and C. A. Browne, jr., upon methods of sugar analysis. 

 Considerable work by the referees and collaborators upon sugar was reported. 

 This has been mainly along lines previously studied by the association. The 

 organic constituents of cane molasses were studied, and methods for the deter- 

 mination of nitrogen in molasses were compared. Data were presented showing 

 variations in the polarization of raw cane sugars. The work on the unifica- 

 tion of reducing sugar methods was reported by P. H. Walker. Tables for the 

 estimation of dextrose, invert sugar, lactose, and maltose have been prepared 

 and published. W. D. Home submitted a method for the determination of 

 sulphites in sirups. 



A report on medicinal plants and drugs was submitted by the referee, L. F. 

 Kebler. The referee on soils, J. H. Petit, reported cooperative work along 

 the lines approved by the association at the last meeting. The referee on phos- 

 phoric acid, B. W. Kilgore, reported that investigations on the determination 

 of available phosphoric acid in basic slag had been conducted, but that the 

 results were not yet ready for publication. The associate referee. J. M. 

 McCandless, reported the results of cooperative investigations on the deter- 

 mination of iron and alumina in phosphate rock and on the neutralization of 

 the official solution of ammonium citrate. 



The referee on inorganic plant constituents, W. W. Skinner, reported inves- 

 tigations on the amount of sulphur and phosphorus found in plant ash 

 obtained by various methods. A. L. Knisely, referee on potash, reported co- 

 operative work on the determination of potosh in one sample of soil and in one 

 sample of a mixed fertilizer containing considerable organic matter. 



The report of the referee on tannin, 11. C. Keed. was mainly an argument 

 for discontinuing work by the association along this line. The association, 

 however, voted to continue the work on this subject. A report on insecticides 

 was submitted by the referee, G. E. Colby. This contained the results of pre- 

 liminary tests of a simple method of determining the kerosene in kerosene emul- 

 sions by the centrifugal method. 



The committee on food standards, through its chairman. W. Frear, submitted 

 a report of progress. The committee was continued. II. W. Wiley, chairman 

 of the committee on fertilizer legislation, submitted a report on conferences 

 concerning a national fertilizer law. The committee was continued with 

 instructions to secure, if possible, the collaboration of the great fertilizer in- 



