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Geumaxy. — The sixty-fourth convention of the Association of German Naturalists 

 and Physicians will be held at Halle from September 21 to 25, 1891. 



The sections of the Association include those for physics, chemistry, botany, physi- 

 ology, pharmacolojjy, pharmacy and pharmacognosy, hygiene, agricultural chem- 

 istry and experimentation, and scientific instruments and apparatus. 



The president of the section for agricultural chemistry and experimentation is 

 Professor Maercker, director of the experiment station of the Central Agricultural 

 Society of the Prussian Province of Saxony at Halle. The program for this section 

 is not yet complete, but it is expected that papers will be presented, among others, 

 by Professors Maercker, Hellriegel of Bernburg, Nobbe of Tharand, and Albert of 

 Halle, the subjects of which have not yet been announced; by R. W. Bauer on (a) 

 Normal Soil, (b) Field Experiments on Sandy Plains, and (c) The Sugar of the Fruit 

 of the Dog Rose ; and the following by Professor Maercker's assistants: Dr. Morgan, 

 The Adulteration of Thomas Slag; Dr. Cluss, The Ai>plication of Hydrotluoric Acid 

 in the Brewing Industry ; and Dr. Gerlach, The Solubility of the Phosphoric Acid of 

 the Soil, and its Relation to the Yield. 



It is expected that Professor Atwater of this Office, will attend the meeting of the 

 Association, and will furnifsh for the Record a report of the proceedings as far aa they 

 are of interest to agriculture. 



