BY MEANS OF A CURRENT METER. 95 
TABLE I. 
Area 
Length[Breadth Draught] ¥7¢* | piap. | mide faa ea 7 water Gales 
surf. ship Middle 9 || GASe Nt ae, ne Ga coef. of 
ft. ins. | ins. | sq. ft.| Ibs. aan rea body ay Cp Gr Co Cw ee 
q. It. q 
NEO oodoae 9.66 | 15.27) 7.57 | 21.28] 396.6] 113.8) 27.1 | 48.6 | 24.3 | .822 | .836 | .985 | .901 | .912 855 
Cerone 6.75 | 19.91] 349.5) 101.2) .... .812 | .827 | .983 | .892 | .911 .833 
Dsisan une 7.57 | 21.05) 384.6] ..... 27.1 | 40.5 | 82.4 | .798 | .811 .891 | .894 ofS) 
Qenataore 6.75 | 19.64) 337.7 .784 | .798 .881 | .891 ACs) 
(Goinreucl bearer 7.57 | 20.83) 372.7 27.1 | 32.4 | 40.5 | .772 | .785 .882 | .876 743 
GARE ES Re 6.75 | 19.39) 326.5 .758 | .771 .869 | .871 724 
Co nanneds 7.57 | 20.58] 360.6) ..... 27.1 | 24.3 | 48.6 | .748 | .76 .872 | .888 .686 
EN ge 6.75 | 19.09) 314.5) ..... .731 | .744 -858 | .851 .668 
WUB375 oo ann 6 9.66 | 16.5 | 6.75 | 20.6 | 358.5} 109.5) 23.8 | 85.7 | 40.5 | .769 | .782 | .983 | .856 | .90 724 
Bec 6.75 | 20.3 | 353.5 27.1 | 32.4 | 40.5 | .758 | .771 .848 | .893 724 
Cu aeoakinn 6.75 | 20.1 | 343.2) ..... 33.9 | 25.6 | 40.5 | .736 | .748 .832 | .883 724 
te Nera 6.75 | 19.65] 332.5) ..... 40.7 | 18.8 | 40.5 | .713 | .725 .816 | .873 724 
Boaooecoo 6.75 | 19.35) 321.0) . 48.5 | 11.0 | 40.5 | .688 | .700 .7197 | .862 724 
Model 1...... 10.0 | 16.0 | 6.26 | 15.65) 222.5) 84.4) 50.0 0 | 50.0 | .515 | .610 | .844 | .72 .716 -60 
6.96 | 16.95} 257.0) 95.8) 50.0 0 | 50.0 | .535 | .622 | .86 735 | .728 -618 
7.66 | 18.22) 295.6] 106. 7| 50.0 0 | 50.0 | .555 | .687 | .871 | .755 | .735 .633 
Model 2...... 10.0 | 17.83) 6.4 | 19.92) 345.0) 111.7] 40.0 | 13.0 | 47.0 | .70 .715 | .979 | .831 | .842 683 
7.2 | 21.83) 894.0) 126.0) 40.0 | 18.0 | 47.0 | .71 .724 | .981 | .848 | .837 701 
8.0 | 22.7 | 445.0) 140.3] 40.0 | 18.0 | 47.0 | .72 .732 | .984 | .863 | .834 .718 
Model 3...... 10.4 | 16.9 | 6.0 | 21.25) 361.0) 99.6) 27.4 | 35.0 | 37.6} .79 .803 | .98 87 .909 775 
6.81 | 22.45) 417.0} 113.3} 27.4 | 35.0 | 37.6 | .80 -815 | .984 | .883 | .907 . 786 
7.56 | 23.45} 469.5) 126.0] 27.4 | 35.0 | 37.6 | .81 .822 | .987 | .894 | .906 . 795 
Model 4...... 10.5 | 15.9 | 6.58 | 21.3 | 379.0} 102.6] 32.5 | 33.3 | 34.2 | .798 | .813 | .981 | .871 | .916 .808 
Model 5...... 10.0 | 16.3 | 7.07 | 21.64] 399.0} 113.7) 30.0 | 40.0 | 30.0 | .802 | .814 | .984 | .872 | .919 807 
Model 6...... 10.1 | 15.72) 7.0 | 21.05] 399.0} 108.6} 23.0 | 50.0 | 27.0 | .8382 | .843 | .987 | .86 -968 .818 
Varnished plane] 10.0} 0.75) 7.0 | 12.5) ..... 5725) lnerceosell Lacerta! her eOw | haces | laorerren| era oul leroenell | eee een ccots 
sections and portion of length devoted to run and entrance. An idea of the difference in the 
shape of the models can be obtained from Figs. 5, 10, 14, 18, 22, and 24, Plates 31, 32, 33, 
34 and 35. 
Table II gives the ratio of total resistance of model to frictional resistance at speed- 
length ratios of .5 and .6. The information given in Tables I and II, together with the body 
plans, shows that Models 1, 2 and 3 were of good form both as regards section shape and 
