1891-92. ] LAKE CURRENTS. ST, 
and a couple of self-registering thermometers, together with one for 
taking deep sea temperatures completed our outfit. The deep sea ther- 
mometer referred to, was supplied by Professor Carpmael from the 
Observatory, and was of a pattern specially designed for taking observa- 
tions on the ship Challenger on its voyages of deep sea investigations; it 
was made by the celebrated firm of Zambra and Negretti. 
Our modus operandi was to start from Church Street wharf, about 
9 a.m.,on board the Ada Alice and visit our stations, take samples of 
water, record the temperatures, and put out generally two floats at each 
station; then come in between 12 m. and I p.m., and start out again at 
2 p.m., and pick up our floats, taking observations by means of the sex- 
tants of their location when taken up. These positions were afterwards 
plotted on a map, showing by means of lines and arrows the direction 
and distance the floats had moved. The direction and velocity of the 
wind was afterwards obtained from the observatory for the correspond- 
ing days and the whole tabulated as follows :— 
: i = ‘ Ron 
= | Mean Velocity, and Direc- “2 hale Z _| s8 
= tion of Wind. eg | Sele | te 
am (e) ‘ = i mn 
DATE. | 5 ge lott (aiee (eee LOCATION. 
= aed (2) fe a pad 
Ss Be | S|] of | Ss 
= 9 a.m. | I p.m. | 4 p.m. 2 f me & cs a2 
A | ie = Nd = 
feet H. M. 
juve! 72520 |52- EF | 6 E 6 E.|S.W.| 0.20 | 4.15 | .047 | Leslie Street. 
= 6) 16) 7° W. |10S.W.| t0'S.W.|NNE| 0.50 | 6.25 | <08 | Eastern Gap. 
: SuesOnera0 Nee era Ne GEN: CEN Eon! || seo.) ety el leeshe street: 
© g| 25 | 6S.W.|6S.W.|7S.W.]S.W.| 2.06] 5 30| .37 Bey) Ue 
mrton 25. (c4e Will ace. 17 Saw SOW. | oa, cB asa! ham es a 
NITE TNR) ie OR Dasa ee E.;/8 E.|S.W.| 1.55 | 6.10 | -.025 i es 
Peete.) 30.) «Calm 71-3:S2| to) NN: }.S. W. |) 3:63) | 4.1: |! 2720. | 24m’s’S. of Vict. P’K: 
BeLOn eQOM See Be a7 es Ben TOs aE. So Wil) 1, OOseoesoulllaakOn mW. Of Island. 
Sepik We2On| 0) We Tae SvE. | nr) 1S: E. | 0.50 | 4.05 | .12 | Eastern Gap, 
| 
Peg) 20. (54). We) for) + Skitrg Ne WaleSe kB; -77.| 4.30 | .17. | Woodbine. 
The observations were continued altogether about 35 days, viz.: 8 day s 
in July, 5 in August, 9 in September and 11 in October. Some days the 
lake was so rough it was impossible to continue our operations; on the 
3rd of July, having got as far as the Eastern Gap we were compelled to 
turn back owing to the quantity of water shipped by the Ada Alice. It 
19 
