AGRICULTUEAL BOTANY. 27 



many manufacturers are careless in mixing and controlling the fertilizer 

 shipped into this State." 



It is stated " that some of the most successful consumers of fertilizer in the 

 State are purchasing the raw materials and mixing their own fertilizer either 

 in wagon beds or other vessels or on the barn floor in a manner similar to that 

 used in mixing concrete. There is no logical reason why fertilizer can not be 

 successfully mixed at home provided proper care regarding weights and thor- 

 oughness in shoveling and mixing the combined materials is exercised. As an 

 evidence of what can be accomplished in mixing fertilizer without machinery, 

 it is only necessary to call attention to the fact that until very recently two 

 manipulators doing business in the State with records among the best have 

 mixed their fertilizers on the floor of their factories." 



To aid those desiring to mix their own fertilizers a list is given of the names 

 and addresses of firms registering raw materials furnishing nitrogen and 

 potash, raw rock phosphate, basic slag, tobacco dust, and dried manure for 

 sale in Indiana. 



Fertilizer analyses, H. B. McDonnell (Md. Affi: Col. Quart., 1910, Xo. //9, 

 jip. 32). — The results of the spring inspection of fertilizers in Maryland, 1910, 

 are reported. 



Report of analyses of samples of fertilizers collected by the commissioner 

 of agriculture during' 1910 (New York State 8ta. Bui. 325, pp. i.)5-2//7).— This 

 bulletin reports analyses of samples of fertilizers collected during 1910, with 

 " figures showing the current values of fertilizer ingredients, with an illustra- 

 tion of the method of applying these figures in determining the approximate 

 commercial valuation of the different brands." 



Analyses of fertilizers and cotton-seed meals, fall season, 1909, and 

 spring season, 1910, B. W. Kilgore et al. {BuI. N. C. Dcpt. Agr., 31 (1910), 

 No. 7, pp. 123). — This bulletin contains analyses of fertilizers and cotton-seed 

 meals collected by the fertilizer inspectors of the state department of agricul- 

 ture during the fall of 1909 and spring of 1910, as well as a list of brands of 

 fertilizers registered for sale in 1910. 



AGRICULTURAL BOTANY. 



Climatolog'y and vegetation in Colorado, W. W. Robbins (Bot. Gas., 1,9 

 {1910), No. J), pp. 256-280, figs. 7).— This paper describes the general topo- 

 graphic, physiographic, and climatological conditions of Colorado and gives a 

 general view of the climatic conditions of different sections of the State in 

 relation to the characteristic vegetation. 



" In general it may be said that the State west of the continental divide is 

 drier from the vegetation standpoint than the eastern slope. Only about 50 per 

 cent of the rainfall on the western slope occurs during the growing season, in 

 contrast with the occurrence on the eastern slope of about 75 per cent during 

 the same period. Hence for any two localities east and west of the continental 

 divide with equal annual precipitation amounts, the locality west will have the 

 more xerophytic vegetation." 



The theory of periodic mutations, liECLERC du Sablon {Rev. G4n. Bot., 22 

 {1910), No. 258, pp. 266-216; ahs. in Compt. Rend. Aead. 8ci. [Paris], 151 {1910), 

 No. .',, pp. 330-332) .—The author discusses the mutation theory of de Vries as 

 applied to (Enothera lamarckiana, and arrives at the conclusion that the muta- 

 tions should be considered as the result of a natural hybrid of this plant. The 

 behavior of the seedlings of this plant is said to conform to the Mendelian theory 

 of hybrids as de\eloped by Batesou, 



