80 The Geology of the Portland Froinordory. 



say, that before I commenced the task of preparing mine, 

 to avoid going over ground already occupied, I took the 

 precaution of asking at the office of the Geological Survey 

 Department what data it possessed in relation to the Portland 

 promontory. In reply to this enquiry I was told that the 

 Government Geological Surveyors had not visited it, and 

 that the department had no official records of its character, 

 nor any plans of the district. My map does not pretend to 

 be more than a first sketch. Before it can be complete 

 many details will ha.ve to be filled in, and some parts of the 

 boundaries of the formations on the north-western base of 

 the promontory may be modified, as the result of a fuller 

 examination. In the mean time, if it should point out an 

 interesting field of work to other geologists, it will have 

 served its purpose. 



Art. VII — On the value of J, and the value of g. 

 By Professor H. M. Andrew, M.A. 



[See Proceedings, page 91.] 



Art. VIII — Note on the Proposed Photog-ixophic Charting 



of the Heavens. 

 By R. L. J. Ellery, F.K.S., F.R.A.S. 



[ See Proceedings, page 93.] 



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