326 



EXPERIMENT STATION RECORD. 



Meudel's law of variation and the application of statistical methods in studying 

 variation and heredity. In the present report an account is given of the results 

 of an examination of a row of peas in the field, in which the length of the vines, 

 number of pods per vine and peas per pod, and length of vines to production of 

 pods were determined, and the range in variation is shown. In connection with 

 these studies the subject of correlation came up, and it was found that the 

 length of vmes and number of pods per vine were found to be closely correlated. 



Gray's new manual of botany, B. L. IIobinson and M. L. Fkknald {Xew 

 York, WOS, 7. cd., pp. 926, figs. i036').— This is a seventh edition of the well- 

 known manual of the botany of the central and northeastern United .States and 

 adjacent Canada, the area now covered being that between 4S° north latitude 

 and the southern borders of Mrginia, Kentucky, Missouri, and Kansas, and from 

 the eastern shores of the continent westward to the Dakotas and eastern 

 Nebraska and Kansas, or to the parallel of 9G° west longitude. 



The material of the old manual has been rearranged and aluiost wholly 

 rewritten, and in its prepai'ation various specialists have revised different orders. 

 The sequence of orders and genera is that of Eichler as elaborated by Engler 

 and Prantl. The system of nomenclature is that adopted by the International 

 Botanical Congress at Vienna in 1905. In order to make the manual as con- 

 venient as possible to the users, synonyms are freely inserted showing the 

 equivalent names that are not sanctioned by the International Rules. The 

 insertion of small text figures will aid the student at arriving at the determina- 

 tion of some of the more difficult species. In the present edition the Hepaticie 

 are omitted and the range is restricted in its western extension, but the whole 

 number of species and varieties of plants treated shows a decided increase over 

 previous editions, the actual number described being 4,885 as compared with 

 3,298 in the sixth edition. 



Handbook of flowerpollination, P. Knuth, trans, by J. B. A. Davis [Oxford, 

 1908, vol 2, pp. y III + 703, pi 1, figs. 210).— This is the second volume of this 

 work (E. S. B., IS, p. 128), and is based upon Miiller's work on the fertilization 

 of flowers by insects. The present volume gives observations on flower pollina- 

 tion made in Europe and in the Arctic regions, 1,686 species of 504 genera 

 belonging to the natural orders Rauunculaceiie to Stylidiefe being reported upon. 



FIELD CROPS. 



A lesson in intensive farming', B. H. Forbes (Arizona 8ta. Bui. 57, pp. 

 267-27. )). — In this experiment intensive culture was practiced between the rows 

 of date palms in a newly established orchard 7.2 acres in size. The outcome is 

 shown in the following table : 



Financial results of intensive cropping on tJie basis of net cash returns to the 



small fanner. 



