5 



the staiion, to whom acknowledgments are due for valu- 

 able and painstaking services. 



In Table I will be found the percentages of potash, phos- 

 phoric acid, and nitrogen in the plant in the flowering stage. 

 The figures given are the means of a number of determina- 

 tions, and are calculated to the dry substance, the moisture 

 of each sample having been carefully determined in the 

 usual way, by separated heatings and weighings until no 

 further loss of weight occurred. In the same Table will be 

 found the weight iu ounces of the seed cotton gathered from 

 each plot. 



To make the results comparable the number of stalks in 

 each plot were counted and the actual weights obtained were 

 reduced to a uniform stand. It should be stated further 

 that the stalks were not as thick in the plots as is usual, and 

 none of them were located near the edge of the plots, the 

 purpose being to allow the roots to have the full benefit of 

 the fertilizers used. 



TABLE I. 



COTTON PLA.NT IX FLOWERING STAGE. 



A glance at the figures in Table No. 1 will reveal sev- 

 eral noteworthy facts. In the first place it will be observed 

 that there is considerable divergence between the maximum 

 and minimum percentages of two of the constituents. That 

 the composition of the cotton plant, therefore, in relation to 

 these ingredients at least, is subject to perceptible variation, 

 cannot be doubted. For instance, the maximum, percentage of 

 potash in the Drake field is 50.8 % higher, and in the gar- 

 den, 21.1 % higher, than the minimum in the same soil ; 

 while the maximum in the garden exceeds the minimum in 

 the 'field by 98 %. The maximum of nitrogen in the field 

 is 17 "o, and in the garden 25.8%, higher than the minimum 

 in the same soil ; and the maximum in the garden, 28.2 % 



