94 Reports & Proceedings — Geological Society of London. 



than six million gallons from the mineral springs of "Waukesha are sold 

 annually. More important, however, are the other sources of wealth. 

 The forest industries are stated to have yielded "far more wealth 

 than the gold-mines of California"; in agricultural industries 

 "Wisconsin ranks about tenth in States for the annual value of farm 

 products: the soils due mostly to glacial drifts are generally fertile, 

 while the manufacturing industries include lumber, metal - work, 

 farm produce, leather, etc. The work is illustrated by maps, diagrams, 

 and photographic views of mine- works, quarries, forest, and logging 

 scenes, soil formation, farm and fruit lands, etc. 



2. Mount Ltell Copper District of Tasmania. — On this subject 

 an important article has been published by J\Iessrs. C. Gr. Gilbert 

 and J. E. Pogue (Proc. U.S. ^t. Mus., vol. xlv, No. 2005, p. 609, 

 1913). The authors deal with the Mount Lyell and North Mount 

 Lyell Mines : the former yields chalcopyrite, etc. ; the latter yields 

 bornite predominantly, with chalcocite, also tetrahedrite and chalco-: 

 pyrite. The history and geology of the area receive due attention, 

 and the authors discuss the paragenesis and secondary enrichment 

 of the ore-deposits. 



Geological Society of London. 



December 17, 1913. — Dr. Aubrey Strahan, F.R.S., President, in the 



Chair. 

 At the conclusion of a paper entitled a " Supplementary Note 

 on the Discovery of a Palaeolithic Human Skull and Mandible at 

 Piltdown (Sussex)", by Charles Dawson, P.S.A., F.G.S., and Arthur 

 Smith Woodward, LL.D,, F.R.S., Sec.G.S., an Appendix by Professor 

 Grafton Elliot Smith, M.A., M.D., V.P.R.S., was inadvertently omitted 

 from the report published last month (see pp. 44-5). Professor Elliot 

 Smith pointed out that the presence of the anterior extremity of the 

 sagittal suture, which hitherto had escaped attention, had enabled him 

 to identify a ridge upon the cranial aspect of the frontal bone as the 

 metopic crest, and thus to determine beyond all question the true 

 median plane. It is 21 mm. from the point of the large fragment 

 (in the frontal region). Mr. F. 0. Barlow called his attention to 

 the fact that the contour of the frontal bone when viewed in norma 

 facialis confirms this identification of the median plane, because the 

 summit of the curve is directly above the endocranial metopic crest. 

 Professor J. T. Wilson pointed out to him that the direction of the 

 orbital plate of the frontal bone is such that it assumes its proper 

 position only when the fragment is so placed that the above-mentioned 

 crest is in the median plane. The backward prolongation of the 

 frontal median crests cuts the parietal fragment precisely along the 

 line determined by Dr. Smith Woodward on other grounds. It 

 indicates that the posterior part of the sagittal suture is obliterated — 

 a view that is confirmed by the presence of an irregular wavy furrow 

 upon the bone, precisely similar to that found in other skulls where 

 this suture had recently closed. This may occur in modern man at 



