CHEMICAL ANALYSIS, 163 
CHAPTER XXIII 
CHEMICAL ANALYSIS OF THE ASH OF THE QUINCE. 
DEAR SIR: 
After a long delay I am able to send you a complete 
analysis of the ash of the quince fruits and wood which 
you sent for examination. I fear that the chemical 
analysis does not indicate very clearly anything of value 
in regard to the nature of the diseases to which the 
quince trees and fruits are subjected. 
QUINCE FRUIT. 
SPHZZROPSIS CYDONIA ROT. 
CONSTITUENTS CO,+C CO,+C+- 
DETERMINED. “A B MEAN. | FREE. a 
7 NTS PAS SCRA |i ceemnery REE 
Silicie Oxide, *14.87 *14.87 *14.87 20.32 
Phosphoric Oxide, 4.40 4.46 4.43 6.05 7.59 
Ferric Oxide, 0.42 0.42 0.42 0.57 0.72 
Aluminie Oxide, 0.12 0.12 0.12 0.16 0.21 
Calcie Oxide, 4.58 4.58 4.58 6.26 7.85 
Mavgnesic Oxide, 5.10 5.13 5.11 6.99 8.77 
Potassie Oxide, 741.02 441.02 741.02 56.06 70.36 
Sodiec Oxide, 41.94 $1.94 $1.94 2.65 3.32 
Sulphurie Oxide, 0.53 0.85 0.69 0.94 1.18 
Carbonic Oxide, 25.20 24.90 25.05 
Carbon (unburnt) *2.30 *2.30 *2.30 
Sulphur (sulphide),| trace trace trace trace trace 
Chlorin, “ be “ 6 “ 
Total, 100.48 100.57 100.52 100.00 100.00 
*One analysis; +mean of 3 analyses. 
PARTIALLY DECAYED (natural), 
z co,+C+ 
CONSTITUENTS CO,+C 4 
DETERMINED. A B MEAN. | FREE om 
Si O, *9.19 *9.19 ¥*9.19 11.72 
P, O 9.59 9.59 9.59 12.23 13.85 
Fe, Os 0.42 0.63 0.52 0.66 0.7 
Al, Oz 0.08 0.11 0.10 0.12 0.14 
CaO 5.54 5.50 5.52 7.03 7.97 
MgO 5.90 5.80 5.86 7.47 8.47 
K,O 445.14 $45.14 $45.14 57.60 65.23 
Na, O 71.64 71.64 41.64 2.09 2.37 
2 0.91 0.79 0.85 1.08 1.22 
CO, $18.71 $18.71 $18.71 
Cc *2.79 *2.79 *2.79 
Ss trace trace trace trace trace 
Cl ss “ “ ‘ “ee 
Total, 99.92 99.89 99.90 100.00 100.00 
*One analysis; t mean of 3 analyses; + mean of 4 analyses. 
