808 
2.45 : 0.6956: : 1.18: # (= 0.3345) 
100 : 0.3345: : 35.71 : # (=0.1198) mag- 
nesia. 
(q) 0.6956 — (0.2101 + 0.1198) = 0.3659 
phosphoric acid with the earths. 
0.3659 + 1.753 (m) = 2.1189 total phos- 
phoric acid in 1000. 
(r) 15 grs. of thealkaline salts (m) were dis- 
solved in water and converted into chlorides 
by admixture with chloride of barium in ex- 
cess; a precipitate of 6.4 grs. of sulphate and 
phosphate of baryta formed ; on treating this 
recipitate with nitric acid, 0.45 sulphate of 
remained. 
15 : 11.1 (nm) : 045 : 0.333. 
100 : 0.333 : : 34.19 : 0.114 sulphuric acid 
in the ash, from 1000 parts of urine. 
But 1000 grs. of urine we found (by &) to 
contain 1.702 grs. sulphuric acid, therefore 
1.702 — 0.114 = 1.588 grs. of sulphuric acid 
have been expelled by ignition. 
(s) The filtered solution was heated with 
caustic and carbonated ammonia to precipitate 
the excess of baryta as carbonate. The whole 
filtered, evaporated to dryness, and ignited to 
expel the ammoniacal salts. ‘The fixed chlo- 
rides weighed 14 grs. They were dissolved in 
water, treated with bichloride of platinum, eva- 
porated nearly to dryness by a water-bath, 
then treated with alcohol, the platino-chloride 
of potassium amounted to 13.40 grs. 
15. : 11.1.:.:.18.40 : 9.916. 
100 : 9.916 : 19.43 : : (= 1.926) potash. 
© But 247, (1 eqt. platino-chlor. potassium) 
: 13.40 : : 76, (1 eqt. chlor. potassium) 
sa (=A: 123) chloride potassium, and 
14— 4.123 = 9.877 chloride sodium. 
15:11.1:: 9.877: 2 (= 7.3089) chloride 
sodium, 
and 60, (1 eqt.chlor. sodium) : 7.3089 :: 24 
(1 eqt. sodium) : x (= 2.9235) sodium. 
(u) 10 grs. of the alkaline salts were dis- 
solved in water, the solution acidulated with 
nitric acid, and nitrate of silver added in slight 
excess: the precipitate of chloride of silver 
amounted to 15.61 grs. 
10 : 11.1 :: 15.61: 2 (= 17.3271) 
100 : 17.3271 :: 25: # (= 4.3317) chlo- 
rine in the ashes of 1000 parts of urine. 
We find the equivalent quantity of sodium 
as follows :— 
36 : 4.3317 :: 
_ equivalent to the chlorine. 
The chloride of sodium therefore amounts to 
7.2195 grs.; deducting the sodium com- 
bined with chlorine from the entire quan- 
tity in the urine (¢), we obtain 
2.92356 — 2.8878 = 0.03576, or 0.0536 
soda. 
24: « (= 2.8878) sodium, 
(v) Now before ignition the chlorine (by i) 
amounted to 4.942 grs. 
deduct.... 4.3317 combined with so- 
dium in the ash. 
0.6103 chlorine volatilized, 
probably in the form of muriate of am- 
monia, the amount of which appears by 
the ape calculation : 
0.6103 : 
ammonia. 
36: 
ORGANIC ANALYSIS. 
x (= 0.9154) muriate. 
The results of the analysis are here sub- 
joined. 
sameie hes kira pore 0 
TER wevecs 2900 
*Organic Uric acid... 0.3700 
matters & / Alcoholicext. 12.527 
ammoni- (77°24 Watery ext.. 1.605€ 
acal salts \ Vesical mucus 
Mur. ammonia 
Chlor. sodium 
Phosphe. acid 
Fixed sa- ? Sulphuric acid 
line mat- -13.1494 Lime, eneeee 
ters... 9 Magnesia ... 
Potash. ..... 
Soda 
In analysing diabetic urine the method m 
be modified, as will be seen by the fe Ow 
example. . 
It was feebly acid, and had a a g 
of 1038. 
Evaporated in vacuo over sul 
it furnished a pale amber-colou 
which weighed, 
On the third day.... 55.9 grs. 
sixth ,...6-. 54-1 
BIND 4). 4.0% 53.4 
fourteenth... 53.1 
thirtieth..... 52.2 
The temperature varied between 60° and 
and the vacuum shewed from 1 inch te 
inches on the pressure gauge. 
The presence of even a very small por 
of air materially retards the progress ¢ 
evaporation. 
rom the weight on the thirtieth day 
500 : 1000: : 52.2: 2(= 104.4) 
contents, and 
1000—104.4 = 895.6 water. 
As a contrast to this evaporation in va 
the remainder from 500 grs. was ey - ' 
by water-bath, the temperature never 
above 180° F. 
In 24 hours the residue weighed 
“a4 
48 @ereseeereerer eres ee etee 
72 ecccecce 0066s 00s 
96  @e eres er ene eeeeee ee ae ) 
By this time it had assumed a dee 
colour, and from being soft and s 
with the exception of a small pone 
centre, become hard and brittle; by @: 
to the air it speedily deliquesced ; 30.6 
the dry mass dissolved in water ; 
with 16.7 grs. of yeast, which from th 
poration of another portion was four id te 
tain 3.5 grs. of solid matter. The 
was set aside for four days at a tempera’ 
70° to ferment; gas was slowly di 
when fresh bubbles ceased to form, tl 
tion was evaporated to dryness, anda 
to 25.8 grs.; deducting 3.5 solid ma 
the yeast, we have an unfermentable n 
* The sulpharic acid has been deduce r 
amount of organic matter detexmiiied’ 
and added to that of the saline matters. 
