Vol. XIX APRIL 15, 1920 No. 2 



JOURNAL OP 



AGRICULTURAL 

 RESEARCH 



CONXENXS 



Pag* 



Effect of Calcium Sulphate on the Solubility of Soils - 47 

 M. M. McCOOL and C. E. MILLAR 



(Cootrlbution fiom Michigan Agricultural Experiment Station) 



Further Studies on the Influence of Humidity Upon the 

 Strength and Elasticity of Wool Fiber - - - - 55 



J. L HARDY 



(Contribution from Wyoming Agricultural Experiment Station) 



Composition and Density of the Native Vegetation in the 



Vicinity of the Northern Great Plains Field Station - 63 

 J. T. SARVIS 



(Contribution from Bureau of Plant Industry) 



Effect of Reaction of Solution on Germination of Seed and 



on Growth of Seedlings ------ 73 



ROBERT M. SALTER and T. C. McILVAINE 

 (Contribution from West Virginia Agricultural Experiment Station) 



PUBUSHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE. 



WITH THE CO(M»ERATION OF THE ASSOQATION OF 



LAND-GRANT COLLEGES 



WASHINOXON, D. C. 



WAIHINarON i OOVCRNMKNT PRINTINa OPriOK ! KM 



