121 
281bs. weight. 
72 . 
65 ... 
78 . 
70 . . . 
close to top. 
in . 
........ 711 .. 
81 . 
73 .. 
at bottom. 
71bs. 
weight. 
81 . 
54 ... 
84 . 
56 ... 
*72 . 
48 .. 
at bottom. 
*75 . 
50 .. 
SECOND 
SERIES. 
281bs. 
weight. 
54 . 
48 .. 
broke at top. 
60 . 
53| .. 
60 . 
531 .. 
63 . 
56 .. 
66 . 
59 .. 
69 . 
611 .. 
at bottom. 
72 . 
64£ .. 
*36 . 
32 .. 
*48 . 
43 .. 
161bs. weight. 
60 . 
50 .. 
66 . 
55 .. 
With one dry leather washer. 
72 . 
60 .. 
V from bottom. 
66 . 
55 .. 
near top. 
Two dry washers. 
72 . 
60 .. 
Three soaked washers. 
78 . 
65 .. 
broke in middle. 
83 . 
69 .. 
It should be noticed that the formula velocity = -^== 
cannot be depended on except as indicating the general 
character of the phenomena ; for let us attempt to deduce 
1 F 1 2 
the height of fall from this formula, h—^~=r. 
An inch wire 1 foot long weighs 3 34 lbs., the breaking 
force in proper units = 80,000 x 32, and the elasticity 
= 25,000,000 x 32, whence h = 38 feet about. 
This discrepancy I have not yet accounted for. 
