224 GEOLOGICAL SURVEY 
“For every 10,000 Ibs. of cotton wool, then, about 60 Ibs. of the above mentioned ingredients 
are substracted from the soil in the proportion indicated by the numbers appended, omitting frac- 
tions. 
IROaSSa. Aa 2) —-' a 31 Ibs 
(hime: == co= -6s= 2 =2=See = 17 
Miso nies] a ae et 3 
‘Phosphoriciacid see == —-—= === == 12 
Sulphuricia¢ dase ese eee 1 
Cotton Seed. 
Phosphate of lime, (with traces of magnesia). ----------- 61.64 
Phosphate of potassa, (with traces of soda)------------- Sileeil 
Sulphate of potassa-_------------------------------- 2.55 
Silica ese ee ee ee eee 1.74 
@anbonaterotelimess = sae = =n eee oat Al 
@arbonate on pmaonesiaem asso = eee .26 
Chloride of potassium. -.------~-------------~------- .25 
Carbonate of potassa.--------------------- 
Sulphate of lime..--.---------------.----- 
Sulphate of magnesia. --------------------- rand loss. 1.64 
Alumina and oxides of iron and manganese in | =o 
LACES = Sen ae ae eee J 100.00 
“Jn comparing the above table with that afforded by the cotton wool, a marked dissimilarity pre- 
sents itself. 'The ash of the cotton seed is fourfold that of the fibre;* while the former has also 
treble the phosphoric acid possessed by the latter, as will more clearly appear, when we present the 
analysis under another form, corresponding with the second table under cotton wool. 
Phosphoric! Acid = 5222S ese naa e 45.35 
IPMN o esos Sess as coSU nS SaaS cdeRSSdsHeS 29.79 
Yay icles te ee a ee ee eee 19.40 
Sulphuric’ Acid--—--4----=4-~ 22-2" 1.16 
95.70” 
a 
This analysis shows the great value of cotton seed as a manure, and indicates what the result 
must be where such highly fertilizing ingredients are repeatedly abstracted from the soil, without 
any return. 
Analysis of a Cotton Stalk—By J. Lawrence Smith, M. D. 
&The ashes of a healthy Cotton Stalk, six feet high, and an inch in diameter, at the largest part, with some 
leaves and empty pods, consists of, n 1000 parts— 
Waimes =. = se oo esses aoe eee 303 
Potash. Acs. 2.2.0 ee a ee eos 
Phosphoriciacids sae en =o een 
IMneresia ee eee ent ee eaten aoe: 
Oxidelotarone- eee eae o ee ee 4, 
Sulphuric acidse sesso. ese eee 13. 
Ohlornes-= 2 eee ee em enea eee 8. 
Carbonic acid= seme ee=. =—-- eae 2005 | 
Sands see Sah 2 eens si cis ofeetore 5. 
+The cotton wool, in 100 parts of weight, gave 0.9247, whilst cotton seed gave 3.856 of ash for the same weight, 
