80 Milk and Its Products 
responding to the assumed least specific gravity of 
milk, or 1.029. -) () 7) 
If; then, in any 1.000 o 
given sample of 
milk the lactom- 
eter fell to 90, ‘Mouse 
it would indicate 
the presence of 10 
per cent of water ; 1.0104 
if it fell to 75, of 
25 per cent of 
water, ete. This 1.015 
form of. lactometer 
is now known as 
the common, or- 
dinary or Board 
of Health lactom- 
eter. A second 
form of lactometer 
in common use 
was devised by 
Quevenne, and 
bears his name. 
The scale of this 
hydrometer is or- 
dinarily graduated 4 | 
from 15 to 40, the 
29 being coinci- a 
dent with 100 up- A 6 c 
on the ordinary lac- Fig. 11. Comparison of graduation on lactometer © 
ie stems: A, hydrometer: B, ordinary lactometer; 
tometer and with QO, Quevenne lactometer. 
COO 
rs 
° 
n 
a 
o 
1 
1..020+ 20 
x 
°o 
rt 
COCOCOCC ee oo 
1, 0264 25- 
eC a HH GS OO 
A 
1, 0380+ 30-4 
1104 
TTT Ty i 
1.035- 1205 
LTT TTT I tt yy 
nd 
