THE PHYSICAL PROPERTIES OF AQUEOUS SOLUTIONS. 
109 
NaCl solutions were made, many of which had to be rejected in whole or in part, 
on account of variations in the water constant. Particulars of the best and most 
accordant set of observations on very dilute solutions are given in Table II.* 
Table II. 
p. 
m. 
Time of 
How. 
St. 
S P . 
St 
V 
Viscosity 
referred to 
water as unity. 
Water 
f 619 
t 618-8 
— 
— 
o-oi 
0-00174 
f 619-3 
< 619-4 
L 619-4 
0-5 
0-00007 
0-010524 
1-0010 
Water 
/ 619-1 
1 619-5 
— 
— 
— 
; 
0-04 
0-00683 
/ 620-0 
t 620-2 
1-2 
0-00029 
0-010539 
1-0024 
0-0915, 
0-0156 
/ 620-6 
\ 620-8 
1 -8 
0-00066 
0-010554 
1-0038 
Water 
_ 
f 619 
< 618-6 
[ 619 
— 
— 
0-131 
0-0223 
/ 620-7 
\ 620-7 
1 -8 
0-00094 
0-010557 
1-0041 
0-335 
0-0573 
/ 622-4 
\ 622-0 
3-3 
0-00242 
0-010601 
1-0083 
0-60 
0-1025 
f 623-5 
x 623-3 
4-5 
0-00433 
0-010643 
1-0123 
1-00 
0-1720 
/ 623-8 
x 624-0 
5-0 
0-00726 
0-010683 
1-0161 
Water 
— 
f 619 
X 618-8 
— 
—- 
— 
— 
In this series the mean value for the time of flow of water at 18° at the beginning 
and end of the observations remains constant at 618‘9. At one point there was a 
variation in the water constant, hut it returned afterwards to the same value, and 
* As my viscosity determinations for very dilute solutions differ materially from Gruneisen’s, which 
are given below, I have thought it well to set out fully the data from which my results are calculated, 
though very little use has been made of data for solutions below 1 per cent, strength in this paper, except 
for the initial process of correcting a. The effect of the solute in dilute solution upon the water itself, for 
which accurate measurements of dilute solutions are required, is left over for the time. 
