92 Coast and Lakes of Gipps Land. 



obtained by a projection from the pendulum of the clock 

 eclipsing a white line on the lower extremity of the large 

 pendulum at the moment the two pendulums passed the 

 vertical together. This coincidence was observed by means 

 of a telescope. The distance of the clock from the pendulum 

 was about eight feet, and the points of the pendulums were 

 rendered visible together in the focus of the telescope by 

 means of an intervening lens. A standard barometer and 

 thermometer were suspended close to the pendulum and 

 were constantly referred to during every series of observa- 

 tions. 



The scale of comparison was finally compared with the 

 ten feet standard bar of the Colony in the Crown Lands 

 Department by the Government Astronomer. In conclusion, 

 Professor Neumayer stated that his speedy departure for 

 Europe would render it impossible to make public the final 

 results until after his arrival there. 



Art. XXV. — Further Notes on the Coast and Lakes of 

 Gipps Land, with sketch plan, being supplementary to 

 report on the Lakes Entrance. 



By Thomas E. Rawlinsok Esq., C.E. 



[Read 29th June, 1863.] 



1. Having late in the month of July last, received instruc- 

 tions to proceed to the entrance of the Gipps Land Lakes, to 

 make a survey of the same for public purposes, I have 

 been enabled to obtain certain data, which I now purpose 

 laying before the members of the Society. 



2. In my report of February last, on the lake entrance, 

 which I was permitted to bring before the Society, I gave a 

 general description of the physical features of the coast line, 

 and of the chief lakes and rivers debouching into them, with 

 such remarks and inferential reasoning on the same as my 

 then means permitted. 



3. Since the date of writing the report above alluded to, 

 great changes have taken place at the entrance, owing chiefly 

 to the great and continuous drought of last summer having 

 reduced the outflow of waters from the lakes, which, com- 

 bined with the action of the tides and of certain winds on 

 the sands of the coast, so far blocked up the old entrance 

 that it could be crossed on foot. These droughts were 

 followed by unusual floods, the waters of which obtained 



