844 
ME. W. HOPKINS’S EXPEEIMENTAL EESEAECHES 
(h.) Last experiment repeated, “with the blocks interchanged. 
1.- 
rA=-ii ft. 
p = 4300 lbs. 
jj ;4=-iift. 
7500 lbs. 
h- 
212° 
#2. 
152° 
159° 
152°*4 
159° 
60= 
-=•168 
c 
k 
7=-'^ ■ 
Taking the mean of the experiments {a.) and [h.), we have for 
L, -=-162; and IL, - = *167. 
Clay. 
VI. [a.) Block I. uncompressed ; II, compressed. 
j r^=-i2ft. 
■ 'l^=atmosph. 
.. rA=-]2ft. 1 
■ 1/) = 7500 lbs. j 
ty 
212° 
! ^ 
! 
! P * 
f'. 
168° 
171°-3 
/g- 
168° 
r- 
52° 
-=•27 
c 
k 
-=•38 
c 
[h.) Blocks interchanged. 
I. 
II. 
t^. 
212° 
162° 
^2* 
l68°-5 
L. 
170° 
^2' 
170° 
r. 
53° 
k 
-=•25 
c 
k 
-=•33 
c 
The means of («.) and (J.) give for I. ~=‘26 ; and for II, -=’365. 
VII. («.) Two compressed blocks of clay. 
, rA=- 12 ft. 
•liu = 4300 lbs. 
,, f^ = -12ft. 
■ Iju = 7500 lbs. 
212° 
l68"°-6 
^2’ 
l69°-2 
171°-6 
^2- 
170°^3 
56° 
i 
-=•30 
c 
-=•34 
