280 
Commercial Value of Artificial Manures. 
AVay. 
Anderson. 
Nesbit. 
£. 
s. 
d. 
£. 
«. 
d. 
£. 
s. 
d. 
1 
0 
0 
0 
10 
0 
1 
0 
0 
Soluble phosphate {i. e. bone-earth rendered 
33 
0 
0 
30 
0 
0 
24 
0 
0 
7 
0 
0 
7 
0 
0 
8 
0 
0 
1 
0 
0 
1 
0 
0 
1 
0 
0 
1 
0 
0 
1 
0 
0 
1 
0 
0 
5G 
0 
0 
60 
0 
0 
60 
0 
0 
Calculated according to Professor Way's table we obtained 
the following value for this superphosphate : — 
Value per Ton. Total. 
£. £. 
Moisture 14-62 
*Organic matter 14-62 x 1 = 14-62 
Bi-phosphate of lime 18-02 
Equal to bone-earth made sohiblc (28-12) x 33 = 927-96 
Insoluble phosphates 8-46 x 7 = 59-22 
■Sulphate of lime 42-15 X 1 = 42-15 
Alkaline salts 2-34 X 1 = 2-34 
Insoluble siliceous matter 
100-00 
* Containing nitrogen . . . . '59 
Equal to ammonia .. '71 X 56 = 39-76 
Calculated value, 10/. 16s. per ton. £1086-05 
Proceeding in the same manner, the price of the same super- 
phosphate will be 101. according to Dr. Anderson's, and SI. &s. 
according to Mr. Nesbit's table. Whether we take Professor 
Way's, or Anderson's, or Mr. Nesbit's tables, in either case 
there is a great discrepancy between the actual price at which 
this article is sold and its calculated value. Similar, and in 
some cases still greater differences can be noticed in the calcu- 
lated and actual value of many samples of superphosphate, 
especially those made exclusively from coprolites and other 
mineral phosphates. It evidently appears from these facts that 
at the time when Professor Way, Anderson, and Nesbit drew up 
their valuation-tables soluble phosphate of lime could not be 
manufactured so cheaply as at present, and that consequently the 
price per ton of soluble phosphate now requires to be reduced, 
especially if Professor Way's or Dr. Anderson's figures are 
taken as standard values in the calculation, and the manure 
under consideration is entirely or principally made from mineral 
phosphates. 
I purposely abstain from giving an amended price for soluble 
phosphate of lime, for such a price cannot well be fixed in a 
general way and then applied to particular instances. 
