erim< 
4 
8 
12 
16 
20 
24 
28 
32 
36 
40 
44 
48 
62 
66 
60 
64 
68 
72 
76 
80 
84 
88 
92 
96 
100 
104 
108 
112 
116 
120 
124 
128 
132 
136 
140 
144 
ROYAL ARTILLERY INSTITUTION. 
Table Till. 
HALS UNDER THE PRESSURE. OE 560 lbs. TO THE SQUARE INCH. 
Nature of 
materials. 
Condition after experiment. 
•i 
© 
Oak ... 
Elm ... 
rd 
Teak ... 
ho 
3 
Pine ... 
o 
W. iron... 
g 
G. metal............ 
Oak . 
a 
13 
Elm .. 
'do 
Teak . 
53 
O 
Pine . 
M 
W. iron.. 
EH 
G. metal... 
Oak . 
© 
•4-3 
Elm ... 
Teak . 
feuo 
£ 
Pine ... 
8 
W. iron...... 
EH 
G. metal.... 
© 
Oak ... 
Elm . 
Teak .. 
hJO 
Pine .. 
© 
t-t 
W. iron.. 
g 
G. metal ........ 
Oak ... 
£ 
pd 
Elm ... 
ho 
d 
Teak ... 
o 
u 
Pine ... 
g 
W. iron.. 
G. metal............ 
**3 
Oak ... 
S 
a 
Elm ... 
Teak ............... 
6 
Pine .. 
"o 
W. iron. 
G. metal..... 
.H 
Grain slightly scored, irregular motion 
Elm compressed, oak slightly scored 
Teak do, oak do 
Pine grain torn up, oak do 
Oak compressed and polished 
do do do 
Oak scored, elm indented and scraped 
to depth of •03" 
Elm scraped up on both pieces 
n slightly scraped, teak perfect 
a much scored, pine torn up 
n slightly compressed 
do do do 
All surfaces perfect, motion regular, 
do do do 
do do de 
Teak scored, pine torn up 
All surfaces perfect 
do do 
Pine compressed *08" 
;; n *05" 
n n- *06" 
All surfaces torn up 
Pine compressed *05" 
n n *03" 
Motion commenced with 781 lbs. the 
oak surface then scraped up, and 
954 lbs. barely sustained motion 
Elm surfaces scraped up 
Teak surfaces slightly do 
Pine surfaces very much scraped 
Motion irregular and jerky 
Motion very regular 
Oak surfaces scraped 
Elm do do 
Teak do do 
Pine do, very much do 
Motion very regular 
a irregular and jerky 
