APPENDIX.

163

The first salt mentioned in these two analyses, the Urate ofAmmonia, is a compound of Ammonia with Uric acid : a peculiarorganic acid, which is formed in the urine of many animals.

G.—COMPOSITION OF THE URINE OF THE COW.

The composition of cows’ urine, and the changes which itundergoes when suffered to putrify, either alone or mixed withwater, are shown in the following table. Urea is a peculiarorganic substance containing a large proportion of nitrogen,which is found in fresh urine. Benzoic and Lactic acids areorganic acids, consisting of cai’bon, oxygen, and hydrogen.

FRESH. PUTRIFIRO RUTR1FIKD

ALONE. WITH WATER

Urea .

. 4000

1000

600

Albumen

10

—

—

Mucus

190

40

30

Benzoic acid

90

250

120

Lactic acid

. 516

500

500

Carbonic acid

. 256

165

1533

Ammonia

. 205

487

1622

Potash .

. 664

664

664

Soda ....

. 554

554

554

Silica

36

5

8

Alumioa

2

—

—

Oxide of Iron .

4

1

—

Oxide of Manganese

1

—

—

Lime

65

2

8

Magnesia

36

22

30

Chlorine .

. 272

272

272

Sulphuric acid

. 405

388

332

Phosphoric acid .

70

26

46

Acetic acid, or Vinegar

. —

1

20

Sulphuretted hydrogen

—

1

30

Insoluble earthy phosphates and |

180

150

Carbonates

Water

. 92624

95442

93481

100000

100000

100000

Spre.ngel.