CHEMICAL EXAMINATION OF BLIGHTED SUGAR” CANES. 189 
again, in diseased troebtc 11*36 per cent. ; in healthy trcebse 
22*82 per cent, silicic anhydride. The quantity of silicic 
anhydride in the last species of cane appears to be much 
below the average, but the fact remains that the diseased 
caoe contained only half as much as the healthy one. 
An analysis of the soil in which the diseased canes sub- 
mitted to me were grown gave the following results : — • 
Analysis of Air-dried Soil. 
The soil was a heavy clay. It contained neither stones 
nor gravel, and only 7*35 per cent of sand. 
1U0 parts contain — 
Soluble silicic anhydride 
0*0007 
Sulphuric anhydride ... 
0*0364 
Phosphoric „ 
0-1164 
Chlorine 
0-0163 
Calcium oxide „ 
0*3613 
Magnesium oxide 
0*2688 
Ferric „ ... 
4-0683 
Iron black ,, 
1-3456 
Aluminium ,, 
2-6827 
Sodium ,, 
0-0443 
Potassium ,, 
0-0987 
Water 
5-3900 
Organic matter, loss, etc. ... 
2-9002 
Clay, etc., insoluble in hydrochloric acid... 
82-6740 
100-0037 
Deduct oxygen equal to chlorine 
0-0037 
100-0000 
Organic matter soluble in water 
0-3050 
Mineral ., „ „ 
0-1900 
Chlorine in aqueous solution 
0-0163 
Sulphuric anhydride... 
0-0209 
Total organic matter, ammonia, etc. 
7-7800 
