826 PROFESSOR CHRYSTAL AND MR E. MACLAGAN-WEDDERBURN 
Data For Locu Earn. 
No. of sie s “a oe 
Sonedine Unit Unit Unit 2 2 Unit 
lane 2) | O92°9 7) 480x040 105 103 
; Feet. | Sq. Feet. | Cub. Feet. Cub. Feet. 
0 0:0 65°5 0 0000 0000 0 
1 0-5 63°9 1467 0483 0023 71 a =6986 x 10+ 
2 2°6 57°5 4939 2293 0526 1132 a’ = 3145 x 104 
3 4°3 51°2 7422 3890 1513 2887 p =a/a' =2°2214 
4 6°2 43°6 9404 5969 3101 5237 p? = 4:9345 
5 | 8-2 35-0 14383 | 7145 | -5105 10275 | logp= -34662 
W. Trinode | [9:2] [30°9] h = 2209 x 106 
6 9-4 29°9 16072 we D Ks) 6266 12722 
| Jake 21:0 17578 "8972 8050 15773 
8 | 12°4 15:3 16119 “9454 8938 15240 
S) 1 ASSP (es) 23918 “9854 WhO) 23571 
W. Binode | [14:0] | [6-0] 
10 | 15°4 0-0 24853 10000 | 1:0000 24850 
TP alas) 10°6 24494 9947 9894 24360 
2, |) age 21:6 21468 9780 "9565 20998 
13) 2171 31-2 19381 9540 ‘9101 18488 
14 | 22°8 39°5 19220 "92,63 8580 17803 
15 | 24°4 46°9 19353 “8961 *8030 17340 
Uninode | [25-2] [50°7 | 
16 | 26:5 56'4 19727 8497 7220 16765 
Mid. Trinode | [27:1] [59°8] 
i zoe 65°4 16506 ‘7980 6368 13175 
IS} |] 2h8)8) 71:0 16211 ‘7619 0805 12351 
19 | 31°3 ie 16702 ‘7192 D172 12011 
205) 3371 85-4 16408 6555 ‘4297 10757 
21 | 35:3 96°4 11899 “0610 “S147 6676 
22 | 3¢-1 104°7 13415 482% °2325 6471 
23 | 39:0 110°8 14175 “4201 “1765 5957 
E. Binode | [39'1] a0) 
24 | 40°6 117-2 11110 3512 1233 3902 
25 |; 42:0 123°7 8574 "2772 ‘0768 2377 
E, Trinode | [43:1] [127-7] 
26 | 44:0 1310 5468 1894 0359 1036 
27 | 45°8 138-2 3261 0978 ‘0096 319 
28 | 47:5 142°5 758 0408 ‘0017 31 
29 | 49°4 145:1 21 0055 0000 0 
30 | 50:4 145°5 0 ‘0000 ‘0000 0 
h = 3ea/Sa? = 2209 x 108. 13°6974 |302575 x 10° 
Periops oF Locu Earn. 
§ 5. If we calculate T,, first on the supposition that Harn is a symmetric parabolic 
lake, secondly on the supposition that it is a semiparabolic lake, we get the following 
values :— 
T, =7(a+a’)/ /(2gh)=14:06' : 4 ; : f (4). 
Toate) /Ggh)=1624 . . ©...) 
