294 



spot where the drift was steadily going on, and from time 

 to time laying bare further portions of the tubes. I dis- 

 covered that the smaller tube of the two ceased to appear 

 much sooner than the larger one. From my knowledge of 

 the original height of the sandhill and the position where 

 the last portion of the larger tube was seen, it could not have 

 been less than 20 to 23 feet in length. The two tubes went 

 straight down and were within 3 inches of each other. The 

 larger tube measured in diameter 39 mm. outsidfe measure- 

 ment, and varied very little, not more than 2 or 3 mm. in 

 thickness. The smaller tube measured 22 mm., and did not 

 vary even so much as the larger one. The figures on page 293 

 are reproductions from photographs of the two fulgurites, 

 and are about half natural size. 



Not within my recollection has any sandhill on my pro- 

 perty been seen to be struck by lightning, but I well remember 

 that thirty or more years ago thunderstorms were very 

 frequent and large trees were struck nearly every season, but 

 of late years such storms with lightning have been of rare 

 occurrence. 



S. A. White. 



Evening Meeting, September 12, 1918. 



A New Locality for Older Tertiary (Miocene) 

 Fossiliferous Beds. 



The recently constructed line to Willunga has exposed 

 the older marine tertiary beds in two railway cuttings in the 

 neighbourhood of Hackham. The first of these occurs 1 mile 

 southward of the Morphett Vale railway station and extends 

 from the 21-milepost to the 21J-milepost. Towards the 

 southern end of the cutting a gravel bed composed of well- 

 rounded white-quartz pebbles, averaging in size about that 

 of kidney beans, rests unconformably upon the fossiliferous 

 beds. The second cutting extends from the 22|-milepost to 

 the 23-milepost, and is capped by travertine limestone. The 

 beds have a maximum thickness (within sight) of 12 feet. 

 An embankment constructed between the two cuttings has 

 been built up from the material excavated from these cut- 

 tings. Sections of the beds can also be seen in the road 

 cuttings which are adjacent to the first of those mentioned 

 as occurring on the railway. On the main road to Adelaide 

 the overlying sands and fine gravel are very conspicuous, but 



