CONVENTION OF OFFICIAL AGRICULTURAL CHEMISTS. 133 



plete extraction of water-soluble nitrogenous bodies and to their 

 complete separation in filtering; thai in making the extract the amount 

 of water be Increased from 500 to L,000cc; and that after the fat and 

 insoluble nitrogenous bodies have been removed by absorbent cotton 

 the filtrate be passed through asbestos. The recommendations were 

 approved. 



rl. S. Chamberlain, associate referee on vegetable proteids, reported 

 1 1 in t no cooperative work had been planned and carried out. The 

 method of H. T. Brown for the separation of the nitrogenous bodies 

 in barley and malt was recommended, and was adopted as provisional 

 by the association. 



A paper entitled Notes on the Determination of Albuminoid Nitro 

 gen in Cereals, by J. A. La (Mere and W. ( '. Lounsbury, was read by 

 title. 



\V. D. Bigelow, associate referee <>n meat proteids, presented a 

 verbal report <>n work done by him and F. ('. Cook on the separation 

 of albumoses and peptones from the lower amido bodies by the use of 

 tlic tannin and sail reagents. 



PHOSPHORIC ACID. 



The referee, E. W. Magruder, made a verbal report on tin- subject, 

 speaking of tin- determination of the neutrality of the citrate solution 

 and suggesting that the determination of iron and alumina in phos- 

 phates he further studied. 



By vote of the association the referee for the coming year was 

 instructed to study and make a report at the next meeting on the off] 

 cial examination of basic slag phosphates, on the determination of iron 

 oxid and alumina in rock phosphates, and on the neutrality of the 

 ammonium citrate solution as actually used by analysts. 



A modified method of determining phosphoric acid was submitted 

 by A. B. Foster, and some results obtained were reported. 



MEDICINAL PLANTS AND DRUGS. 



The referee. L. F. Kebler. recommended that the association adopt 

 the method prescribed by the eighth revision of the United States 

 Pharmacopoeia for the assay of opium as a provisional method that the 



work on the analysis of opium he continued and extended to ipecac 

 and goldenseal; and that associate referee- he appointed to take up 

 different features of the work. 



SPECIAL COMMITTEES. 



Food standards. A report of progress \\:t- submitted by the chair- 

 man of the committee, W. Frear. It was stated that standards for a 

 number of products were decided upon during the year and that tenta- 

 tive standards were also drawn up and distributed to those interested. 



