jection. But it is certainly an object to exceed rather than fall
short of the mark, so as to leave none of the insoluble phosphate
unacted on.

The above statement gives us the composition for the best ar-
ticle of "Super-Phosphate of Lime," and though it cannot be
practically made in such a perfect manner as it is represented by
the above numbers, it will, nevertheless, be the surest and most
natural standard by which the quality of all fertilizers belonging
to this class should be estimated.

Let us now see what Dr. Stewart says in his "Report of Anal-
ysis of a sample of C. B. DeBurg's Super-Phosphate of Lime."
The following is a true copy of the published analysis, with an
annexed recapitulation as given by him:

"Report of Analysis of a sample of "C B. DeBurg's Super Phosphate

of Lime.

February, 1854.
Proximate Analysis.

Water.......................................................... 16.40

Organic matter,

Containing Ammonia......................................... 25.50

Ash..............................................................*58.10

Proximate Analysis of Above Ash.

Phosphoric acid................................................ 18.63

Lime............................................................ 21.33

Magnesia....................................................... 02.79

Insoluble residue.............................................. 09.80

Salts, Potash and Soda, Sulphuric acid, &c.............. 05.55

*58.10

Total proportion of manure soluble in fresh cold water was found to
be twenty-eight (28) per cent.—of this nearly two parts were Phos-
phoric Acid, viz: valuable elements soluble in water.

Phosphoric acid................................................ 1.81

Potash of Soda................................................ 2.00

Volatile compounds, containing Ammonia............... 16.15

Sulphuric acid, Lime, Magnesia and other elements of
less importance............................................. 08.04

28.00
Recapitulation.

Total proportion (per cent.) of valuable elements in this "Chemical
Manure"—3.75 or nearly four per cent, of Nitrogen, equal to 4.54 or
nearly five per cent, of Ammonia; 18.63 or nearly nineteen per cent.

86