COMPARISON OF Q WITH PS. 
903 
D. 
C. 
F. 
E. 
20-1 
20 
765-5 
20-9 
20-15 
20-03 
765-58 
20-95 
20-2 
20-1 
20-25 
20-1 
765-43 
20-9 
20-25 
20-13 
20-2 
20-07 
765-5 
20-91 
I + X, Q + 0-42gr. + Y 
Scale. 
20-51 
20-90 
20-49 
20-81 
20-87 
20-47 
20-31 
20-95 
20-79 
20-62 
Q + 0-42gr. + Y, I + X 
20-2 20-07 765-5 20-91 10(I + X), 10(Q+0-42gr. + Y) 206-72 10(Q+0-42 gr. + Y), 10(1 + Y) 
Scale. 
19-01 
17-91 
17-27 
17-40 
17-01 
16-45 
16-95 
16- 31 
16-20 
17- 05 
171-56 
20(Q+ 0-4 gr. + Y) 20(1 + Y)— 0-4 gr. + 35-16 pts. 
40(Q+0-4gr.)il40l-0-8gr. + 52-51 pts. in air (0=19-99, C = 19-86, F=765-48, E=20-8). 
Q + 0-4 gr.£!; I— 0-01589 grain in air (<=19-99, ^=762-92). 
gr- 
t. 
b. 
Q£!: I- 0-40229 
20-31 
760-35 
Qi2:I-0-40023 
20-29 
759*93 
Q£iI-0-38862 
21-03 
758-68 
Q £1:1-0-37877 
20-80 
Q£1:I-0-41589 
19*99 
762-92 
According to Steinheil, the density of quartz at 0° is 2'650962 of the inaxitnuin 
density of water, and its cubic expansion for 1° C. is 0*00003255. 
The weighings of Q in water give 
Water at 18° displaced by Q. 
Logarithms. 
2639-831 
3-4215760 
2639-809 
3-4215725 
2639-838 
3-4215774 
2639-825 
3-4215751 
2639-819 
3-4215742 
2639-814 
3-4215733 
Mean ... 
... 2639-823 
3-4215748 
Maximum density of water: A water at 18 ... 
0-0005867 
rQ at 18 
... 2643-391 
3-4221615 
Q 
... 7002-368 
3-8452449 
AQ at 18 : maximum density of water 
2-649009 
0-4230834 
AQ at 18 : a water at 18 
2-652590 
0-4236701 
The density of Steinheil’s kilogramme of quartz at 18° in terms of the density of 
water at 18° is 2*652908. 
The logarithm of the volume of Q at f, in volumes of a grain of water at its 
maximum density, will be 3*422161 5 18) X 0*00001413. The comparisons of Q 
with I in air, reduced with this value of the volume of Q, give for the absolute 
weight of Q in a vacuum, 
gr. 
Q=I + 2-36801 
Q=I + 2-36871 
Q=I + 2-368l7 
Q=I + 2-36782 
Q=I + 2-36715 
No. of comparisons. 
40 
40 
40 
40 
40 
Mean 
Q=I+2-36797 
200 
