324 Reviews — Brief Notices. 



XIV. — The Eesources of Tennessee. By A. H. Purdue and W. A. 

 Nelson. Vol. iii, No. 2, pp. 62-116, April, 1913. 



IN this number A. H. Purdue contributes two short articles. One 

 outlines the principles of water-supply for cities and towns, and 

 is illustrated by a section showing the water-bearing strata at Etowah. 

 The otlier points out the grave need for geological investigation of 

 the foundations of large engineering structures. 



C. H. Gordon has written an account of the principal types of 

 iron-ore deposits and their origin, with special reference to Tennessee. 

 The deposits of limonite of East Tennessee are shown to be due to 

 the weathering, probably in Tertiary times, of ferruginous limestones 

 of Ordovician age. The haematite deposits are of two types : residual 

 deposits, due to the leaching out by surface waters of calcium carbonate 

 in ferruginous limestones ; deposits of the Clinton type, in which 

 the hsematite occurs as beds of original deposition which have since 

 undergone secondary enrichment. This paper contains four figures 

 and numerous analyses. 



The discovery of Mastodon remains in a quarry near Nashville is 

 recorded. The remains consisted of teeth and bones, and were 

 found at a depth of 15 feet in a clay-filled solution channel in the 

 Carters Creek Limestone. 



XV. — Brief Notices. 



1. Institution of Mining and Metallurgy. — "We have received 

 the Presidential Address delivered on Alarcli 13, by Mr. Bedford 

 McNeill, F.G.S., before this Institution. He discusses the relations 

 between mining and capital, the extension of mining, and makes 

 especial reference to the relative and average annual production of 

 gold and silver at various periods from 1493 to 1911. He also calls 

 attention to the meeting of the International Congress of Mining, 

 Metallurgy, Applied Mechanics, and Practical Geology to be held iu 

 London in 1915. The address is accompanied by an admirable 

 portrait of the President. 



2. Sinai : Gebkl Hamman Faritn. — Mr. G. W. Murray has an 

 interesting note on the structure of tliis hill in the Cairo Scientific 

 Journal, vol. vii, pp 21-4, February, 1913. The sea-face of Gebel 

 Hamman Farun shows 45 metres of bedded basalt resting uncon- 

 formably on variegated shales yielding many fossils, including 

 Hemiaster. The basalt is overlain apparently conformably by 

 15 metres of Oyster limestones, among which Ostrea vesicularis is 

 conspicuous. The evidence points to a contemporaneous flow in 

 Santonian times. The hill is faulted down at its noi-th-west end, 

 and the basalts are not seen therefore at the' ])oint of previous interest, 

 where the hot springs gush out amongst the beach sliingles for some 

 400 metres. 



3. California^ Tertiary Sharks. — Messrs. Jordan and Beal, 

 having received a large collection of shark's teeth from the Kern 

 Iliver, near Oil City, have been enabled to add several species to the 

 fossil sharks of California. When describing these in the Bulletin of 

 the University of California, 1913, they have taken the opportunity 



