HISTORY AND BIBLIOGRAPHY 837 



A. B. McCready of the Ontario Agricultural College gives the 

 results of germination tests of alfalfa and clover in which the 

 superiority of bright, clean seed is shown. 



Australia. — A. J. Ewart made tests of various grass and garden 

 seeds with reference to the vitality of seeds after a sea voyage. In 

 a lengthy report on the prolonged vitality of seeds it was found 

 that quite a per cent of seeds germinated after half a century. 

 Rees made a study of hard seeds with reference to the cuticular 

 layer. This layer repelled the water and for the same reason seeds 

 retain their vitality. 



BIBLIOGRAPHY. 



CHEMICAL COMPOSITION OF WEEDS. 



Bailey, E. H. S., & Sayre, L. E. On the presence of barium in the 

 ash extract of certain Kansas weeds. Trans. Kans. Acad. Sci. 

 23-24:194-198. 



Cassidy, James, & 'Brine, D. Some Colorado grasses and their 

 chemical analysis. Bull. Col. Agr. Exp. Sta. 12 :151. 



Ooessman, C. A. Analyses of weeds. Bull. Mass. Agr. Exp. Sta. 

 17:5-6. 



Jenkins. E. H., & "Winton, A. L. A compilation of analyses of 

 American feeding stuffs. Bull. Exp. Sta. U. S. Dept. Agr. 

 11:155. 



Knight, H. G., Hepner, F. P., Nelson, Aven. Wyoming forage 

 plants and their chemical composition. Bulls. YYyo. Agr. Exp. 

 Sta. 65:52; 70:75; 76:119; 87:153. 



Pammel, L. H. The Russian Thistle. Bull. la. Agr. Exp. Sta. 

 38 :24. 



Patrick, P. E. Chemical analysis of Russian thistle. Bull. la. 

 Agr. Exp. Sta, 26:26-29. 



Peter, A. M. Kentucky Forage Plants — Analyses of some Ken- 

 tucky grasses. Bull. Ky. Agr. Exp. Sta. 87 :111-122. 



Weems, J. B., & Heileman, W. H. The chemical composition of 

 squirreltail grass. Bull. la. Agr. Exp. Sta. 30:320-321. 



Stutzer, A., & Seidler, L. The content of important food ingre- 

 dients in some common weeds. Fiihling's Landw. Ztg. 57: 

 429-430. 1908. 



DISTRIBUTION OF WEEDS. 



Acloque, A. Flore de France. 816. Paris, 1896. Flores regional 

 de la France. 1904. 



