CONVENTION OF GERMAN EXTERIMENT STATIONS. 453 



of the Germiiii Empire, and of such a complex political character. 

 Opinions dilVered as to the propriety of taking further otlicial notice of 

 the pami)hlet, some believing it would be better to leave the defense to 

 individual members. The matter was finally settled by passing a 

 resolution rebuking Professor Mayer for what was considered an unjust 

 attack upon the association. 



The following resolutions received their first reading and favorable 

 action, and will be brought before the association again at its next 

 annual meeting: 



(1) Only water shall be used in making the solution in analysis of 

 Stassfurt potash salts. The short method (Fresenius) for i^otash deter- 

 mination is accepted as the association method, although the potassium- 

 platinic chlorid jirecipitate should be purified by dissolving, etc. 



(2) In superphosphate the citrate-soluble phosphoric acid as deter, 

 mined by Petermann's method is to be separately determined when 

 requested instead of designating the sum of that soluble in water and 

 in the citrate sokition as *' citrate- soluble" phosphoric acid. 



(3) The ammoniacal nitrogen in ammonia salts and mixtures of the 

 same with superphosphates or other materials is to be determined by 

 heating 1 gm. of substance with 3 gm. of magnesium oxid as nearly 

 free from carbon dioxid as possible. The question whether thjs sub- 

 stance itself or a solution of the substance is to be used for this deter- 

 mination is to be further investigated by the committee on fertilizers. 



(4) The designation '"Ammonia-nitrogeu sui^erphosphate (Am. st. 

 Sup.)" customarily used by the Germau Agricultural Society for fer- 

 tilizers composed of mixtures of ammonia salts, materials containing 

 organic nitrogen, and superphosi)hates is undesirable and leads to con- 

 fusion. Accordingly a new designation is to be fixed u])on. 



(5) The committee on fertilizers is instructed to make comparative 

 studies of the determination of sesquioxids by the methods of Crisj)o, 

 Glaser, and von Griiber. 



This concluded the business of the general sessions and there re- 

 mained ouly some social features — a dinner at the "Kurhaus," and 

 later in the evening a final and informal gathering at the hotel, similar 

 to that of the first evening. 



For the following day (Sunday) short excursions to interesting 

 points along the Rhine had been planned, but the rain interfered with 

 these arrangements. 



The next annual meeting of the association will be held at Bruns- 

 wick in September, 1897. 



