TSiE itOtAL AETlLLtlEY INSTITUTION 
133 
TWO SURFACES. TABLE I. CoilthlUCd . THROUGH OAK. 
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ft.0 
in. 
lbs. 
lbs. 
lbs. 
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ft. 
18 1 
4 
660 
2343 
... 
per sec 
... 
Fir surface destroyed, oak scored. 
1' 
625 
17 2 
64 
35 
590 
605 
•270 
30 
3-79 
6 
Motion regular. 
3 
600 
1 
a 
660 
18 2 
32 
70 
704 
689 
•307 
30 
3-79 
6 
Motion regular. 
3 
704 
1 
r © 
715 
Slightly jerky. 
19 2 
16 
140 
740 
728 
•325 
75 
8-92 
6 
3 
730 
1 
© 
700 
20 2 
M 
4 
560 
728 
714 
•318 
52-5 
6*49 
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Wood greatly compressed and 
3 
728 
polished. 
4 
700 
1 
729 
Eegular. 
21 2 
M 
64 
35 
749 
739 
•329 
30 
3-79 
3-3 
3 
o 
739 
1 
729 
22 2 
tUD 
a 
32 
70 
679 
699 
•312 
30 
3-79 
5 
Eegular. 
3 
o 
u 
689 
1 
lR 
r 4 ' 3 
879 
23 2 
Is 
16 
140 
869 
870 
•388 
75 
8-92 
0-75 
Slightly jerky. 
3 
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864 
1 
a 
840 
24 2 
i 
4 
560 
870 
847 
•378 
45 
5-61 
6 
Wood compressed and polished. 
3 
o 
840 
4 
840 
TWO SURFACES. 
Table II. 
THROUGH ELM. 
r 
863 
25 2 
a 
64 
35 
863 
853 
•380 
30 
3-79 
15 
Eegular. 
3 
r © 
833 
1 
'£1 
799 
20 2 
ojD 
i R 
32 
70 
799 
796 
•351 
30 
3-79 
30 
Accelerated motion. 
3 
?■ O 
789 
1 
27 2 
3 
cS 
O 
16 
140 
799 
819 
809 
809 
•361 
75 
8‘92 
60 
Very jerky. 
Same as No. 3 experiment. 
28 1. 
4 
560 
1510 
eg* 
... 
Oak scored^ elm indented and 
1' 
937 
scraped to depth of •03 // . 
29 2 
0 
64 
35 
903 
907 
•405 
30 
3-79 
9 
Eegular. 
3 
■© 
888 
1 
^0 
799 
30 2 
r 
32 
70 
784 
782 
•349 
30 
3-79 
17 
Accelerated motion. 
3 
r g 
764 
1 
679 
31 2 
a 
16 
140 
739 
699 
•312 
75 
8-92 
73 
Same as No. 3 experiment. 
3 
679 
32 1. 
J 
4 
560 
1960 
Elm scraped upon all its surfaces. 
1 
1076 
33 2 
64 
35 
1061 
1069 
•477 
30 
3-79 
2*4 
Eegular. 
3 
a 
1071 
1 
*© 
834 
34 2 
Ud 
32 
70 
799 
809 
•361 
30 
3*79 
12 
Accelerated motion. 
3 
53 
794 
1 
* 
765 
35 2 
•4*3 
16 
140 
749 
748 
•334 
75 
8-92 
30 
Same as No. 3 experiment. 
3 
729 
1 
© 
EH 
607 
38 2 
4 
560 
613 
604 
•270 
30 
3-79 
20 
Elm slightly scored, teak perfect. 
3 
- - 
592 
