THE ROYAL ARTILLERY INSTITUTION 
147 
Table XVII. 
GENERAL SUMMARY OR SERIES b . 
Pressures from 0’5 to 2 - 5 tons. 
8 = 32 square inches. 
C Per 32 sq. inches, tons. 
Pressure < 
(.Per 1 sq. inch, lbs. 
0-50 
35*0 
0-75 
52-5 
1-0 
70-0 
1-25 
87-5 
1-50 
105 
1*75 
122*5 
2-0 
140 
2*25 
167’5 
2-50 
175 
Mean. 
Oak through oak 
Mean value of R, lbs. 
375 
660 
904 
1052 
1123 
1263 
1432 
1528 
1712 
Coefficient . 
•334 
•333 
•403 
•375 
•334 
•322 
•320 
•303 
•305 
•337 
Motion per minute, ins. 
15 
15 
18 
24 
18 
12 
12 
10 
5 
14 
Oak through surfaced iron:— 
Mean value of B, lbs. 
365 
577 
737 
940 
1147 
1360 
1593 
1773 
2093 
Coefficient ... 
•331 
•343 
•329 
•337 
•341 
•347 
•355 
•352 
•373 
•345 
Motion per minute, ins. 
4 
4 
6 
4 
6 
6 
6 
6 
6 
6 
Surfaced iron through oak:— 
Mean value of B, lbs. 
370 
494 
737 
943 
1145 
1335 
1543 
1697 
1957 
Coefficient . 
•330 
•294 
•324 
•336 
•340 
•340 
•344 
•336 
•349 
•333 
Motion per minute, ins. 
9 
10 
10 
8 
12 
10 
9 
13 
12 
10 
Surfaced iron through surfaced iron:— 
Mean value of B , lbs. 
469 
679 
962 
1495 
1925 
2226 
2448 
2740 
3018 
Coefficient . 
•418 
•403 
•425 
•533 
•573 
•568 
•546 
•543 
•538 
•606 
Motion per minute, ins.. 
8 
7-5 
Teak through teak:— 
Mean value of B, lbs. 
409 
688 
724 
1000 
1151 
1377 
1637 
1795 
1852 
Coefficient .... 
•365 
•350, 
•323 
•357 
•343 
•351 
•365 
•356 
•331 
•349 
Motion per minute, ins. 
6-7 
6 
4- 
5-3 
5-1 
6 
5 
5-1 
4 
5-2 
Teak through surfaced iron 
Mean value of B, lbs. 
392 
518 
644 
723 
863 
980 
1093 
1198 
1336 
Coefficient . 
•348 
•308 
•287 
•258 
•257 
•250 
•244 
•238 
•239 
•270 
Motion per minute, ins. 
3-7 
1-5 
1 
1 
0-6 
0-6 
0-6 
0-6 
0-7 
1-1 
Surfaced iron through teak:— 
Mean value of B, lbs.. 
290 
364 
493 
610 
736 
862 
1103 
1242 
1354 
Coefficient . 
•259 
•217 
•220 
•218 
•219 
•220 
•246 
•246 
•242 
•232 
Motion per minute, ins. 
2-2 
2-0 
1-6 
1-1 
1-5 
1-5 
1-8 
1-6 
1-7 
1-7 
Ground iron through ground iron:— 
Mean value of B, lbs. 
500 
736 
954 
1186 
1272 
1251 
1444 
1621 
1674 
Coefficient . 
•446 
•438 
•4261 
•423 
•379 
•319 
•322 
•321 
•299 
•375 
Motion per minute, ins. 
... 
7 
5-1 
2-6 
50 
3-2 
2-6 
2-7 
2 
3-8 
[VOL. VI.] 20 
