OF SOUTH CAROLINA. 225 
“The half per cent. of sand arose from what was on external portions of the stalk, and could 
not be readily dusted off. The carbonic acid arises from the combustion of the plant, and does 
not previously exist in it. The chlorine, that is but a little over a half per cent. the sulphuric acid, 
which is but little over one per cent. and the oxide of iron, which is not one half per cent. may be 
considered as ingredients of but little, if of any, importance to the plant. 'Thereby reducing the 
really important ingredients to phosphoric acid, potash, lime, and magnesia. 'This last, however, 
is always to be looked upon, in plants, in the light of lime, and it can be replaced by lime entirely, 
without prejudice to the plant. The analysis which I have made of the cotton wool and seed, as 
well as the analyses made by others, of the same, show that in these, also, phosphoric acid, pot- 
ash, and lime are the important constituents.”— Report to the Black Oak Ag. Soc. 1846. 
As the stalks are generally returned to the soil, their composition will not be taken into the 
account in estimating the amount abstracted from the soil by the cotton plant. 
Analysis of the Fibre of Sea Island Cotton—By. Dr. Ure. 
Carhonaterof potash’ =2-+—--:.-- --22.222 See 44.8 
Munnterom potashes= ss2=2 52-552 aaan= ae eee 9.9 
Dulphateron potash —en e 9.3 
Ehosphater of limos*=>=s==soee amas ase en eas 9.0 
@anrponateof lime-=- <== <2 2s See ast ee eS 10.6 
Phosphatelof magnesia: =—== "2225-25 222=2-24 2° 8.4 
SE ESrOmoacrOl WON senna as eae © mee rote 3.0 
Alumina, (a trace,and: losss- =< = OO) 
100.0 
Although there is a considerable difference in the proportions of the ingredients present in the 
two varieties of cotton, as exhibited by these analyses, they both show the presence of all the lead- 
ing and important salts. 
Analysis of Indian Corn.— By Prof. Shepard. 
100 parts of the grain left nearly 1 per cent. of ash, composed of— 
Silidats 22487 ae 32a chee Reh TM as 88.45 
Potassa, (with traces of soda)..--..--.-------- 19.51 
Phosphatesof-limecs< so. Sessa s= ale 
Phosphate: of magnesia=== ss5s2522252- 22S 13.83 
Phosphate otepotassaeo2-2= ayes ne ase 2.24 
Carbonate:on limess+ 4 s=-2S2622 2-222. 5 2b42 2.50 
Carbonate of magnesia-..--.=--------------- 2.16 
Dulphatetor limes sss ees eet WAS) 
Silica mechanically present-._--.--.--.-----.- 1.70 
Alam ing oot Se eee ee ce ket traces. 
WWOHSE Ss 22 So 2s eto eee eR SL tee 1.65 
100.00 
“Omitting the silica, which is unimportant, and the carbonic acid, which is a product of the 
analysis, we have, in every 100 parts of the ash of Indian corn, the following important con- 
stituents. Potassatemee n=: Soo:5 2 = boon eee 20.87 
Phosphoriemeid. sseoce = 2k eee ee 18.80 
IMGs 500" =eee cot ee ee eee 9.72 
Manes hese eerie oek oe ae 5.76 
55: 
So that every 1000 lbs. of corn abstracts from the soil 54 lbs of these most fertilizing ingredients. 
56 
