310 EXPERIMENT STATION EECOED. 



" The medium sized capsule used in tliese experiments has a distinct ten- 

 dency to decrease the maximum pressure and to retard combustion. The other 

 capsules have a much less marked but similar effect. The pellet form of 

 material in all cases markedly decreases the maximum pressure and retards 

 the combustion. 



" The incorporation of inert material is without appreciable effect on the 

 maximum pressure, l)ut markedly retards the rate of combustion. Anthracite 

 coal results in low maximum pressures, but the rate of combustion is extremely 

 slow, sharply contrasting with results from bituminous coal." 



Proceedings of the twenty-second convention of the Association of German 

 Agricultural Experiment Stations, Stuttgart, September 15 and 16, 1906, 

 (handle. Vers. Stat., 66 {1901), No. 3, pp. 169-251). — This account contains a 

 brief report on the work and expenditures of the association during the past 

 3'ear ; the discussion and adoption of an amended rule requiring a unanimous 

 vote of members present for the adoption of new methods or the change of 

 old official methods ; instructions to the fertilizing experiment section to test 

 the difference in efficiency of the nitrogen of horn meal and bone meal and 

 the influence of the organic matter of raw bone on the action of its phosphoric 

 acid ; a second report on investigations on sulphur for use in vineyards ; on 

 steps taken to fix the limits of variation in the composition of ammouiated 

 superphosphates ; on definition of the unallowable impurities of bran and of 

 seeds, and the allowable percentage of sand in feeding stuffs ; a paper on 

 examinations of potash salts falling below standard grade and the adoption of 

 a resolution declaring the so-called works analyses unreliable; a report on 

 comparative tests by a number of experiment stations of the von Lorenz method 

 of determ'ining phosphoric acid, especially as applied to the determination of 

 citric-acid-soluble phosphoric acid in Thomas slag, the convention ordering a 

 further comparison of the method with the ordinary official methods ; a report 

 on certain misunderstandings arising in the Thomas slag trade ; discussions of 

 methods of detecting mites in feeding stuffs and of determining the purity of 

 linseed cake ; and a brief account of progress made in perfecting a method of 

 determining fat by shaking with ether. 



Various other reports on matters of organization, policy, and cooperation 

 between agricultural organizations, etc., are also included. 



Proceedings of the twenty-third annual convention of the Association of 

 Official Agricultural Chemists, held at Washington, D. C, November 14^16, 

 1906, edited by H. W. Wiley (['. H. Dcpt. Agr., Bur. Chcm. Bui. 105. pp. 213, 

 fig. 1 ) . — This is the official report of the proceedings of the convention. A sum- 

 marized account of the meeting has been given (E. S. R., 18, p. 396), and a cir- 

 cular of the Bureau containing extracts from the proceedings noted (E. S. R., 

 18, p. 711). 



Analyses for members during 1906, J. Hendrick (Trans. Highland and Agr. 

 Soc. Scot.. 5. .ST/-.. 19 (1901), pp. l-'i5-l-'il). — Brief notes are reported regarding 

 the analysis of fertilizers, feeding stuffs, and miscellaneous samples. 



METEOROLOGY— WATER. 



Studies on the thermodynamics of the atmosphere, F. H. Bigelow (V. S, 

 Dept. Agr., Weather Bur. Doc. 372, pp. IV + 73, pis. 10, figs. 3.5).— This is a 

 series of reprints from Monthly Weather Review for January, February. March> 

 June, July. August, October, November, and December, 190G, of papers discuss- 

 ing asymmetric cyclones and anticyclones in Europe and America ; coordination 



