ON THE PERIODS AND NODES OF LOCHS EARN AND TREIG. 839 
§ 19. Data For Locu Treic. 
| | 
r v o oa 
oe Bid Unit Unit Unit a a2 Unit 
ite 2 3465 | 7744 x 102 106 OS 
‘ Feet. | Sq. Feet. | Cub. Feet. Cub. Feet. 
0 0:0 24:47 0 0000 | -0000 0 
1 2:2 22°73 239 1370 70188 | 33 
2 6:0 18°34 972 4382 1920 426 a=4814 x 104 
3 9°8 13°26 1804 “7064 4990 1274 Gi) = WSS) sx IO 
S. Trinode | [12:2] [9°37] | p=a/a =2°5403 
4 | 13°8 6:79 2227 | -9230 | 8519 | 2056 | p2=6-4529 
5 | 181 0:00 2704 1:0000 | 1:0000 2704 log p= "40488 
S. Binode | [187] | [0-89] | h= 2507 x 108 
Galei22:3e i) eG Lh 2568 | “9903 | -9807 2543 
W262 11°47 2307 9660 9332 222 
5 29:5 S10 - 15:96 2201 ‘9340 8724 2056 
9 | 34°6 22°36 2357 8706 SAY) 2052 
Uninode | [35-6] [23°61] | 
INO) || aksir/ 27°64 1831 8023 6437 1469 
Mid. Trinode | [39:2] [28:03] 
ll | 42:0 31:24 1772 “TATA 5586 1325 
12 | 43-9 33°75 1816 “7051 “4972 1281 
13 | 46:9 37°84 2067 6293 3960 | 1301 
14) 51:1 42°72 1394 D266 Ohne |) 734 
15 | 56-4 48°20 773 3989 "1591 308 
N. Binode | [56-7] [48-40] 
16 | 60:0 50°98 440 *B274 1072 144 
17 | 64:3 54:40 626 2340 0548 147 
N. Trinode | [65-2] [55°12] 
18 | 68:3 5T D7 297 1420 "0202 | 42 
WE) (eh 59°43 138 0858 ‘0074 | 12 
AO) 12 60°28 107 0594 0035 6 
21 | 75°8 61°40 43 0240 0006 1 
22 | 776 61°83 24 0105 ‘0001 0 
23 | 78:0 62°16 0 0000 0000 0 
. h=Zoa/Za? = 25072 x 105 88316 22143 
Periops oF Locu 
TREIG. 
§ 20. A few rough trials shew very readily that the uninodal period of the lake is 
nearly 9’. Using the method already explained for Harn, we derive the following table 
of first approximations :— 
| ! 
| a a6 | Te 
| Parabolic . ; : . | 9:00 5:19 | 3°67 
| Semiparabolic . : = || S0X0) 4-93 3°40 
eq ei O00" | 95.064.) 3°54 
TRANS. ROY. SOC. EDIN., VOL. XLI. PART III. (NO. 
32). 
123 
