ON THE PERIODS AND NODES OF LOCHS EARN AND TREIG. 
§ 23. BrnopaL Periop or TREIG. 
— | Y 
at c a 4(5 + a) 4(5 — a) | 4£(3 +a) 4(3 — a) Kier 1) 
| | | 
6:06 | 12°2943 | 7:0836 30209 | —-5209 2°5209 | —1:0209 — 22608 
507 |12°2456 | 70698 | 30175 | -—-5175 | 2°5175 | -—1-0175 | —-18883 
DOS) | 121980.| 70564 |. 3-014 |) Sonal | 25141 | —1-0241 | —-15178 
T c a |#5+a0)) 40-a) | 48+a)) 43-2) Ke, 1) 
| 
5-06 | 1:9052] 2-9361 1:9840| -5160 14840 | -0160 — 06223 
5:07 | 1:8977 | 2°9310 |/1:9828 | -5173 14828 | -0173 —-06714 
508 | 1:8903 | 2:9260 | 19815 | -5185 14815 | -0185 — 07165 
| 
T | xc) | CDi. 
5-06 | --06799 | -04972 
5:07 — "01827 | -04850 
5:08 +°03023 | 
| | 
T= 5:0738' = 5-074’, say. 
C= 12°2275 ; Cp — 8950; 
Corrected for map error, T, = 5099. 
§ 24. TRINODAL PERIop oF TREIG. 
ae c a 4(5 +a) 4(5-a) | $(3+a) 4(3 -—a) K(e, 1) 
3550 | 24°977 | 10°0453 | 3:7613 | —1:2613 32613 | —1:7613 4°60935 
3°565 | 24°767 | 10°0035 | 3°7509 | —1-2509 3°2509 | — 1°7509 4°89966 
3°575 | 24-629 | 9:9758 | 3°7440 | —1:2440 | 3-2440 | -1:7440 | 5:10266 
rT c a. 45+a')| 4(5-a) | 4(3+e)| 2(3-ca) | Ke, 1) 
3-550 | 3:8707 | 4:0599 | 2°2650 ‘2350 1:7650 | —‘2650 | —2-03981 
3°565 | 378382 40438 | 2:2609 2391 17609 | —°2609 — 1:97823 
3°575 | 3°8168 4:0333 2°2583 ‘2417 17583 | —°2583 — 1:94017 
841 
