424 EXPERIMENT STATION RECORD. 



and M. B. Hardin, Clemson College, S. C. The referees and associate 

 referees will be announced later. 



Some of the more important features of the convention are sum- 

 marized below. 



SUGAR. 



The referee, L. 8. Munson, reported that the work done during the 

 year was largely a continuation of the lines of investigation reported 

 upon at the last meeting. The results, as a whole, were considered 

 extremely gratifying, especially as regards methods for the deter- 

 mination of various reducing sugars in mixtures of dextrose and levulose 

 in the presence of sucrose, methods for molasses analysis, and the 

 unification of methods for reducing sugars. 



The referee recommended that the work on sugars be continued 

 until uniform methods are obtained for the various reducing sugars, 

 and that copper-sugar factors be determined for the various concen- 

 trations of the different reducing sugars and for various mixtures and 

 proportions of sucrose and reducing sugars, which was approved. He 

 also recommended that the methods selected by the International Com- 

 mittee for Unifying Methods of Sugar Analysis be made official; that 

 the method for the determination of copper in the cuprous oxid pre- 

 cipitate requiring reduction in hydrogen, and also the electrolytic 

 methods C and D, on page 38 of Bureau of Chemistry Bulletin 46, be 

 dropped as official methods; and that Low's thiosulphate method, as 

 given in the report of the referee, be substituted for the volumetric 

 permanganate method of the association. Action on these recom- 

 mendations was deferred for one year. 



The report on special analytical methods, by C. A. Browne, jr., asso- 

 ciate referee, embraced a study of a method for the analysis of simple 

 mixtures of reducing sugars, further trials of a method for the deter- 

 mination of dextrose, levulose, and sucrose in mixtures, and a study 

 of the influence of temperature upon the polarization of raw cane 

 sugars. The recommendations that the work upon the separation of 

 sugars be submitted to collaborative tests, and that the work upon the 

 identification and determination of the various organic solids-not-sugar, 

 upon which some progress was made during the year, be continued, 

 were approved b}< the association. 



The associate referee on molasses methods, H. E. Sawyer, presented 

 a verbal report giving some general results obtained with his method 

 of examining dark molasses, in which the normal weight is made up 

 to 500 cc. Recommendations regarding changes in the official methods 

 were deferred until the next meeting. The recommendations that a 

 further study be made of the choice of a constant or variable factor 

 for empWrnent in the Clerget equation and that a table of logarithmic 

 factors be prepared for use with the new modification of the Soxhlet 



