144 Notes on the Meteorology 



In addition to the various meteorological elements herein 

 referred to, the amount of direct sunshine and percentage of 

 ozone in the atmosphere is now observed at Omeo, but as 

 the period of observation does not extend beyond July of 

 present year the results are not given. It may be remarked, 

 however, that the ozone reaction seems to be greatest with 

 winds from the south, and least with northerly winds, 

 although further more extended observations may modify 

 this result. In respect to the .sunshine recorder, I may state 

 that from a number experiments made with a view to obtain 

 an inexpensive instrument, I have found that a blown glass 

 sphere filled with water, and with a glass tube bent like a 

 syphon, to allow for expansion of the water during great heat, 

 acts admirably ; the heat rays passing through the vessel, 

 without much interference, burning a line on the prepared 

 paper at the true focal length. The only difficulty in using 

 this instrument is the rapid expansion due to the reduced 

 temperature — i.e., when the water freezes in the sphere in cold 

 weather ; but as the temperature during the day never sinks 

 below the freezing-point — i.e., when the sun is shining — this 

 difficulty is obviated by removing the instrument, which is 

 on a movable stand, inside at night. Various other forms of 

 meteorological phenomena — such as optical, electrical, &c. — 

 remain to be discussed ; but as these have not, so far as I 

 am aware, any direct influence in estimating the probable 

 climatology of a district, I have not thought it necessary to 

 furnish any particulars of records taken of the former in the 

 present paper. 



Traces of a Former Glacial Period in the Australian 



Alps. 



In concluding the present introduction to the Meteorology 

 of the Australian Alps, I have great pleasure in reporting 

 what may, I think, be considered as conclusive evidence of 

 the existence of a glacial period in the Australian Alps 

 during Post-miocene Times. The able arguments set forth 

 by Mr. Griffiths, in his "Evidences of a Glacial Period in 

 Victoria during Post-miocene Times," read before this Society 

 on 19th March last, led me to examine carefully the 

 surroundings of the Dry Gully and Lake Omeo areas, with 

 the results that I have been fortunate enough to discover 

 undoubted evidences of glacial action. Distinct rock striae 

 on hard filsitic and porphyritic rocks at Omeo Plains ; on 



