10 EXPERIMENT STATION RECORD. 



Analysis of potash salts. — The only recommendation reported under 

 this Lead was that of F. Xobbe that the Kali Syndicate of Stassfiirt be 

 allowed a representative in the permanent section of the association, 

 which was adopted. 



Fertilizer control. — The form of contract between fertilizer manufac- 

 turers or dealers and the exi^eriment stations, and the plan of adjust- 

 ment of differences regarding- fertilizer analyses adopted at the last 

 meeting, was discussed and modified to some extent, but the essential 

 features, as heretofore published in the Record, remain the same. 



Soil analysis. — A. Emmerling reported on the methods proposed by 

 J. Kiihn at the previous m»eeting. The principal modifications of 

 Kiihn's methods i)roposed were changes in the classification of the soil 

 particles and the substitution of Wagner's modification of Kiihn's elu- 

 triation cylinder for the original Kiihn cylinder. The classification, 

 proposed is as follows : 



Over 5 mm. diameter, stone, gravel, etc. 

 5-2 mm. diameter, "grand." 

 2-1 mm. diameter, very coarse sand. 

 1-0.5 mm. diameter, coarse sand. 

 Fine earth ^ 0.5-0.2 mm. diameter, medium sand. 

 Under 0.2 mm. diameter, fine sand. 

 (^Suspended matter (very fine sand, silt, clay, etc.). 



For chemical analysis it was recommended that the fine earth obtained 

 by sifting the dry soil through a 2 mm. sieve be used. 



A simple method of determining the volume of soil was described by 

 K. Heinrich. as follows: An amount of fine earth corresponding to 100 

 gm. of dry substance is placed in an ordinary burette filled to the first 

 mark with white sand, and then saturated with water. After the 

 excess of water is drained off the volume is read from the scale. 



On motion of Wagner, the methods recommended were ordered to be 

 subjected to trial during another year, and on motion of Klein, it was 

 directed that trials of Schone's apparatus be included in the compara- 

 tive tests. 



Seed control. — After a report by Kobbe was read and discussed a per- 

 manent section on seed-testing was appointed, consisting of three mem- 

 bers, for the purjiose of improving methods, and especially of securing 

 uniformity. This committee consists of Nobbe, Heinrich, and Dietzell. 



Analysis of feeding stuffs. — The recommendations of the reporter on 

 this subject, A. Emmerling, after fall debate and amendment by H. 

 Schultze and G. Loges, were adopted, as follows: 



(1) The qualitative examination of feeding stuffs for sand as well as 

 mineral adulteration is made obligatory, and when the preliminary test 

 indicates the presence of more than normal amounts, quantitative deter- 

 mination by incineration and extraction with hydrochloric acid is to be 

 carried out and the results reported when the content of these materials 

 is 1 per cent or more. 



(2) The permanent section on feeding stuffs recommends that in each 



