ON STEAMSHIP PERFORMANCE. 131 
to show how shape might have been economized, and how each vessel of entire 
: D : 
afterbody. The formule used for the calculations are r= Lx® for the coefficient 
the middle body, and -5 IM+-5 1'Q@+-19635 BO®+1'@ for testing the dis- 
belonging to the length of bow thus found ; further, a column has been added 
: ae ber | 
sy Ses : A se A on o8$ 
ae | 23 8 @ a8 ee ge 
Be BE e "ey 25 £22 Speed 09.8 «|, Speed, 
zs ES a | 82 [82 ¢! ofship.| % tp |in statute 
ao 34 ES ng Gob can pa fice fo a SBD. ee miles. 
Sa aa a Tad Se . |S boo| Sh 
ee | Bee | £2 | 28 | eae eies Ze 
At | AF | FB | 38 | S83 Sess AB 
tons. tons. tons. tons. knots, 
189° 185 618° 620 5806 o812 12°96 95°5 15°03 
239°36 279°17 819°97 820 5969 1053 12’ 82" 13°92 
159°81 484°47 $39°8 840 "6130 "1476 12'2 84°57 14°15 
190°89 546°74 979°95 980 | "5905 | ‘0951 | 12:23 85°33 | 14°18 
346°19 352°88 | 1149°99 1150 | "5757 | ‘066% | 12'9 95° 14°96 
398°81 29824 1219°97 1220 *5718 "0595 LIES 76° 13°37 
399°48 422°45 1344°92 1345 "5734 ‘0612 | 12" 82" 13°92 
370'08 561°20 1410°06 1410 5797 0731 12°5 89'08 14°50 
183°63 263°31 679°62 680 5924. "0980 13°61 105'5 15°78 
206°54 709'92 1173'07 1173 6037 *I241 13'23 Too" 15°34. 
300°42 614°76 1299'92 1300 "5856 084.5 12'288 85"92 14°25 
598°72 921°82 -| 2299°96 2300 *5761 "0667 14°67 122° 17°01 
1028°32 648°36 3033°88 3034. "5292 0536 13°771 | 107°67 15°97 
945°6 1683: 304803 3840 5862 "O9gI 13°898 | x10 16°12 
946°1 1718° 3860'1 3862 "5932 "01003 | 13°906 | x10° 16°13 
96"90 53°34 279°97 280 "5601 10417 Ea4 1355 17°74 
597°90 4173 1815'13 1815 5659 0425 16°28 148° 13°88 
12°83 17°18 44°99 45 “6421 2333 10°53 63°5 12°21 
12°76 18'19 46°51 465 6148 *I4g1 10°85 67° 12°58 
144°91 27°09 359° 359 | ‘5811 | ‘o761 9°6 53° II"I3 
521°69 841°78 2034°91 2035 5827 0788 9°5 51°20 II‘0z 
304'70 143°81 839°92 840 "5838 "0810 122 82° 13°92 
450°42 96174. 196509 1963 “6105 “14.09 II‘Ig 75° 12'98 
TO017'03 IZ 5520 2494" 2487 “5595 "0415 12°46 88°5 14°45 
1036°60 589°97 | 2971°77 | 2972 | °5779 | ‘0699 | 12°556 89°5 14°56 
1006°86 623°57 2939°93 2940 "5766 0677 13°34 101"16 15°47 
Io16‘or 1024°4. 3375°01 3375 "5709 "0580 14°25 TI5"92 16°53 
53-56 13°76 139°99 TAO" | °552% | “ogax | xare 1Ig°5 16°82 
ven the virtual length of forebody, answering to the given displacement, is in 
ost cases even longer than the length of forebody as required for speed; and 
t, therefore, in very few cases the ratio in which the actual length of afterbody 
8 less than least proper length as required for speed can be calculated. 
ng 
