226 REPORT OF THE SECRETARY GENERAL. 



SUBSECTION 4. 

 APPLIED CHEMISTRY. 



Acctdn del stUfato de manganeso en la fermentacidn vinica, by Juan B. Lara. 

 A simple, efficient, and economic filter. Its application to the filtration of 



the yellow precipitate in phosphoric acid estimations, by S. L. Jodidi 



and E. H. Kellog. 

 Chemical research as a directing aid in the effiderU utilization of pine forests, 



by Chas. H. Herty. 

 Contribucidn al andlisis toxicoldgico del mercurio, by Carlos Renson. 

 Contribucion al estiidio de las lacas color eadas que forman las mater ias 



colorantes oxhidrUadas con los mordientes oxidicos, by Pedro Bruno 



Guggiari. 

 Deter rmnacidn del oxigeno activo en los perboratos y polvos para lavar per- 



boratados, by Pedro Bfuno Guggiari. 

 Drying oils produced in the Americas, by Henry A. Gardner. 

 Dyestuffs from materials native to Latin American countries, by Samuel 



P. Sadtler. 

 Food and efficiency, by Harvey W. Wiley. 

 Paint for tropical climates, by Maximilian Toch. 



Pharmaceutical products from Latin American drugs, by A. R. L. Dohme. 

 Rubber, by Percy H. Walker. 

 Standard methods for sampling and analyzing coal, by A. C. Fieldner, 



G. S. Pope, and J. D. Davis. 

 Standard methods of sampling and analysis and standard samples, by 



Wm. F. Hillebrand. 

 Tanning materials from native sources in Latin American countries, by 



Thomas H. Norton. 

 Th£ application of the paper pulp filter to the quantitative estimation of 



calcium and magnesium, by S. L. Jodidi and E. H. Kellog. 

 The cement industry and its future development, by Edwin C. Eckel. 

 The genesis of the Chilean nitrate deposits, by Joseph T. Singewald, jr., and 



Benjamin Le Roy Miller. 

 The interrelations of pure and applied chemistry, by F. W. Clarke. 

 The manufacture of gasoline and benzene-toluene from petroleum and other 



hydrocarbons, by W. F. Rittman. 

 The value of scientific research and laboratory control in the manufacture of 



foods, by W. D. Bigelow. 

 Water purification and sewage disposal, by William Pitt Mason, 



