HORTICULTURE. 



537 



a few culms to 280. A few were nearly inuuune to rust. Weight showed greater 

 variation than any other character studied statistically. Charts show the 

 meteorological conditions dnrinj; the experiment and the place variations in 

 bloom, width, and weight. The following table shows the principal correlations 

 observed : 



Correlation of characters in timothy. 



Year. 



Characters correlated. 



Correlation. 



1905 

 1906 

 1907 

 1905 

 1906 

 1907 

 1905 

 1906 

 1907 

 1905 

 1906 

 1907 

 1905 

 1906 

 1907 



Earliness and height , 



do 



do 



Earliness and weight 



do 



do 



Duration of bloom and height. . 



do 



do 



Duration of bloom and weight. 



do 



do 



Weight and height 



do 



do 



Weight 1905 and weight 1906. . 

 Weight 1906 and weight 1907 . . , 

 Weight 1905 and weight 1907. . 

 Height 1905 and height 1906. . . 

 Height 1906 and height 1907 ... 

 Height 1905 and height 1907. . . 



-0.052±0.011 



-0.108±0.011 



-0.236±0.011 



0.119±0.011 



-0.047 ±0.011 



-0.186±0.011 



-0.052±0.011 



0.004±0.011 



-0. 138±0.011 



-0.192±0.011 



-0.042±0.011 



-0.154±0.011 



0.274±0.011 



0.454 ±0.009 



0.718±0.006 



0.474± 0.009 



0.550 ±0.008 



0.382± 0.010 



0.519 ±0.008 



0.585± 0.008 



0.486± 0.009 



Studies in Indian tobaccos. II, The types of Nicotiana tabacum, A. and 

 G. L. C. Howard {Mem. Dcpt. Agr. India, Bot. Ser., 3 {1910), No. 2, pp. 59-176, 

 pis. 58). — This discusses the stability of types of N. tabacum, gives a classifica- 

 tion of types, and describes and illustrates a large number of them. 



Wheat {Jour. Bd. Agr. [London], 11 {1910). No. 3, Sup. I,, pp. 8-',, fig. 1).— 

 This contains a series of papers, read at the Winnipeg meeting of the British 

 Association for the Advancement of Science, August, 1909, on the economic 

 position of wheat growing with s]iecial reference to northwestern Canada, fac- 

 tors determining the yield of wheat, wheat breeding, seed selection, the baking 

 qualities of flour from Canadian wheats, the chemical work on Canadian wheat 

 and flour, strength and quality in wheat flour, and the chemical properties of 

 wheat flour. A bibliography of the last-named subject is given. 



Cultural methods for wheat in dry countries {Bui. Off. Gouvt. G6n. Alg6rie, 

 1910. No. 12, Sup., pp. 199-217). — C.eneral directions are given for the produc- 

 tion of wheat under dry farming conditions. Rotations are outlined and sug- 

 gestions given for the management of fallows. 



The cultivation of " stronger " and more valuable wheats for export from 

 the Punjab, W. C. Renouf {Dcpt. Agr. Punjab, Bui. 1, 1910, pp. iO).— Corre- 

 spondence on the improvement of strength in wheats grown in the Punjab is 

 reported. 



HORTICULTURE. 



[Fruits and plants to be used as stocks recommended for introduction 

 into the United States], A. Aaronsoiin {U. S. Dept. Agr., Bur. Plant Indu.s. 

 Bui. ISO, pp. 13-27, figs. 5).— The author describes a number of fruit trees 

 growing in Palestine which it is believed might be successfully used as stocks 

 for extending fruit culture in certain regions of the United States, where fruit 

 growing is now either unsuccessful or limited. These include Zizgphus spina- 

 christi, Z. lotus, and Paliurus spina-christi, recommendetl as stock for the 

 Chinese jujube; Pistacia terebinthus, P. palcestina, and P. atlantica, as stocks 



