156 
MINUTES OF PROCEEDINGS OF 
Table XXXII. 
GENERAL SUMMARY OF SERIES d. 
Pressures from 0‘5 to 2-5 tons. S = 32 square inches. 
Pressure | 
‘Per 32 sq. in., tons. 
w 1 ff lbs. 
1 
0 - 5 
35 
0-75 
52 - 5 
■ 1-00 
70 
1-25 
87-5 
1-50 
j 105 
1 
1-75' 
122‘5 
2-0 
140 
2-5 
175 
Mean. 
Oak through 
f Mean value of B, lbs. 
566 
845 
1258 
1436 
jl590 
! 1788 
2038 
oak. 
^ Coefficient . 
•505 
•503 
•562 
•513 
I -473 
•457 
i '455 
•495 
Oak through 
f Mean value of B, lbs. 
594 
975 
1317 
1514 
1874 
! 
! 2313 
2579 
surfaced iron. 
1 Coefficient . 
•530 
•580 
•588 
•541 
•558 
: *590 
•576 
•566 
Surfaced iron 
C Mean value of B, lbs. 
521 
706 
996 
1288 
1727 
! 
2256 
2387 
through oak. 
1 Coefficient . 
•465 
•420! 
•445 
•460 
•514 
•575 
•533 
•489 
Surfaced iron' 
^ Mean value of B, lbs. 
437 
662 
1255 1 
1233 
1569 
1857 
2029 
through 
surfaced iron. J 
^ Coefficient . 
•390 
•394 
•560 
•440 
•467 
•473 
•453 
*454 
Ground iron ' 
£ Mean value of B, lbs. ! 
1459 
2548 
3162 
3022 
3984 
through | 
ground iron. J 
| Coefficient .j 
1-303 ■ 
| 
1-137 
•941 
•675 -711 
•953 
Table XXXIII. 
SHEWING COMPARISON OF STATICAL AND DYNAMICAL COEFFICIENTS OF FRICTION. 
Pressures from 0-5 to 2 - 5 tons. S = 32 square inches. 
Pressure | 
Per 32 sq. ins., tons. 
,»1 zr lbs. 
O’5 
35 
0-75 
52-5 
1-0 
70 
1-25 
1 87-5 
1-50 
105 
1-75 
122-5 
2-00 
140 
! 2-5 
! 175 
Mean. 
Oak through 
( Statical . 
*505 
•503 
•562 
1 
•513 
•473 
•457 
•455 
•495 
oak. 
\ Dvnamical. 
•334 
•333 
•403 
1 '375 
•334 
•322 
•320 
•346 
Oak through 
f Statical . 
•530 
•580 
•588 
! 
•541 
•558 
•590 
•576 
•566 
surfaced iron. 
\ Dynamical.. 
•331 
•343 
•329 
•337 
•341 
•347 
•355 
•340 
Surfaced iron 
C Statical . 
•465 
•420 
•445 
•460 
•514 
•575 
•533 
•489 
through oak. 
\ Dynamical. 
•330 
•294 
•324 
•336 
•340 
•340 
•344' 
•330 
Surfaced iron’ 
) Statical . 
•390 
•394 
•560 
•440 
•467 
•473 
•453| 
•454 
through 
surfaced iron.. 
t Dynamical. 
•418 
•403 
•425 
•533 
•573 
1 
•568 
•546; 
•495 
Ground iron ’ 
/ Statical . 
1-303 
1-137 
•941! 
■676 1 
•711 
•953 
through ! 
ground iron.. 
t Dynamical. 
•446 
•426 
•379; 
| 
... 
•322 
1 
•299 
•376 
