96 Coast and Lakes of Gipps Land. 



20. It will be most interesting to hear again of these 

 wanderers, as they may afford more positive data relative to 

 the final course of this current. 



21. The second point which I deem of importance, is the 

 atmospheric tide, as contra and distinct from the diurnal 

 tides. By a reference to the tidal diagram on the drawing, 

 and the accompanying meteorological register, it will be seen 

 that the ordinary lunar tides appear as mere diurnal undula- 

 tions upon the surface of a greater and more general wave. 



22. The origin of this larger wave, or, as I have before 

 termed it, this " atmospheric tidal influence," was for some 

 time a complete enigma, which I attempted to solve, by 

 supposing the depression and. elevation of the waters to be 

 caused by winds, on or off the shore, heaping up or depressing 

 them as the case ' might be ; but, although there was some 

 show of reason for this idea, there were discrepancies which 

 could not be fully reconciled with the theory, and I was led 

 to consider how far the barometer readings would account 

 for the phenomena presented. 



23. After a careful analysis of the record, I believe the 

 results justify me in regarding the readings, when taken 

 in connection with the wind register, as sufficient to account 

 for the apparent anomalies. 



24. In the instances where the barometer readings would 

 appear at first sight to be at fault, a reference to the wind 

 register shows influences which modify the results but do 

 not affect the theory, and as the wind can only be looked upon 

 as a result or consequence of the atmospheric conditions, of 

 which the barometer is the index, even the anomalies them- 

 selves may, in my opinion, be quoted as a confirmation of 

 the theory advanced. 



25. After reviewing the various phases of the question, 

 I have arrived at the conclusion that the larger undulations 

 of the ocean, as shown on the tidal diagram, are the result 

 of the atmospheric waves indicated by the barometer, the 

 existence of which has been hitherto suspected, but of which 

 I am not aware that any one has had the opportunity 

 previously of demonstrating from regular observations. 



26. By reference to the register, it will be seen that, on 

 the 28th August, with the barometer at 29 "50 and north- 

 west winds, the waters stood high ; and the subsequent 

 fluctuations of the barometer, the winds and tide-levels are 

 in accordance, until the maximum pressure of 30*25, shown 

 by the barometer on the 5th September, gives the greatest 



