references: technology 7 



PLANT PHYSIOLOGY.— r/)e water requirement of plants. II. A 

 review of the literature. L. J. Briggs and H. L. Shantz. Bureau 

 of Plant Industry, Bulletin 285, 19L3. 

 This paper reviews the literature relating to the water requirement of 

 plants. In summarizing the papers the data are presented in tabular 

 form and arranged Avith respect to the subject considered, such as the 

 effect of soil moisture content, type of soil, amount of soil used, ferti- 

 lizers, temperature, light, humidity, carbon dioxide content of the air, 

 relative leaf area, duration and period of growth on the water require- 

 ment, as well as the water requirement of different plants when grown 

 under comparable conditions. L. J. B. and H. L. S. 



REFERENCES 



TECHNOLOGY. — Recent -papers of the Bureau of Standards: 



The dehydration of clays. G. H. Brown and E. T. Montgomery. Pp. 2.3. 



1913. 



The effect of overjiring upon the structure of clays. A. V. Bleininger mid 



E. T. Montgomery. Pp. 23. 1913. 



The technical control of the colloidal matter of clays. H. E. Ashley. Pp. 118. 



1913. 



The determination of phosphorus in steels containing vanadium. J. R. Cain 



and F. H. Tucker. Pp. 11. 1913. 



Electrolytic corrosion of iron in soils. Burton McCollum and K. H. Logan. 



1913. 



