
TO THE DETERMINATION OF THE EFFICIENCY OF MACHINERY. 715 
TABLE II. 
Connecting-rod, 28”. Crank, 8”. Mass of connecting-rod, 28 lbs. Mass of 
piston and piston-rod = 46 Ibs. Speed, one revolution per second. 








| teens G28 
Piston, mass = M. Connecting Rod, mass = M’. 
dx dé ad FR Fy Fy vou 
Position oe M dz a aR Tee ar OF OTe 1a 
© ie and g de See and eae and as pee Mh, (Gy Mls ee g at 
Crank. | seconds. Ibs. seconds. seconds. oa Oe gat Ibs. and 
lbs. bs. lbs. inches. 
0 —33°76 | —48:23 1-795 0 — 29°36 ol 0 0 
it —31:93 | —4561 1739 | — 2°703 | —27-77 SOT — 275 | — 311 
2 —26°70 | —3814 1571 | — 5342 | —23-22 2°50 — 542 | — 61:3 
3 —18°81 | —26°87 1:296 | — 7°797 | —16°36 70 — 791 | — 875 
4 — 941 | —13-44 0-926 | — 9863 | — 818 0:87 —10:01 | —113°3 
5 — 008 | — O11 0-483 | —11:269 | — 0:07 0:24 —1143 | —129-4 
6 7:85 11°21 0 —11-770 6°83 0 —11-94 | —135-2 
7 13°54 19°34 || —0-483 | —11:269 Lay 0:24 —11-43 | —129-4 
8 16°91 24:16 || —0°926 | — 9-863 14:70 0:87 —10°01 | —113°3 
9 18°41 26°30 || —1:296 | — 7°797 16-01 1°70 — 791 | — 875 | 
10 18°88 26:97 || —1:571 | — 5°342 16°42 2°50 — 542 | — 61:3 
1B) 18°91 20s | — 1-739 | — 2-708 16-44 3°07 — 275 | — 311 
12 18°80 26°86 || —1°795 0 16°35 a2) 0 0 
13 18-91 27:01 || —1°739 2°703 16°44 3°07 2°15 Sisk 
14 18°88 26°97 || —1:571 5342 16°42 2°50 5°42 oles 
15 18-41 26°30 |; —1:296 Tilo 16:01 1:70 (eon 87-5 
16 16°91 24:16 || —0°926 9°863 14°70 0:87 10:01 113°3 
1M 13:54 19°34 || —0-483 11°269 Te 0:24 11:43 129°4 
18 7°85 11°21 0 11-770 6°83 0 11°94 135-2 
1g) — 0:08 | — O11 0°483 11:269 | — 0:07 0:24 11:43 129-4 
20 — 941 | —13-44 0926 9863 | — 818 0°87 10°01 Mlle re; 
21 —18-81 | —26°87 1:296 7797 | —1636 17.0 TOL 87°5 
22 — 26°70 | —3814 a7 5342 | —23-22 2°50 5°42 61:3 
23 —31:93 | —45°61 oo 2°703 | —27:°77 3°07 2°75 311 
24 —33°76 | —48:23 1795 0 — 29°36 3°27 0 0 



The engine of Table I. was also examined when running at a speed of four 
revolutions per second. This, of course, had the effect of multiplying = 
a6 dx 
i and aa 
may, therefore, be deduced from Table I. by multiplying column 4 by four, and 
columns 2, 3, 5, 6, 7, 8, and 9 by sixteen. 
by four, and by sixteen. The Table for this set of circumstances 
VOL. XXVIII. PART III. 9A 
