Reviews — Geo- Theology. 81 



lations living on Mgh-lying pervious soils than among populations 

 living on low-lying pervious soils. 



(3.) Within the same counties, there is less phthisis among popu- 

 lations living on sloping impervious soils than among populations 

 living on flat impervious soils. 



(4.) The connection between soil and phthisis has been established 

 in this inquiry — 



(a.) By the existence of general agreement in phthisis-mortality 

 between districts that have common geological and topo- 

 graphical features, of a nature to affect the water-holding quality 

 of the soil. 

 (6.) By the existence of general disagreement between districts 

 that are differently circumstanced in regard of such features ; and 

 (c.) By the discovery of pretty regular concomitancy in the 

 fluctuations of the two conditions, from much phthisis with 

 much wetness of soil, to little phthisis with little wetness of soil. 

 But the connection between wet soil and phthisis came out last 

 year in another way, which must here be recalled — 



{d.) By the observation that phthisis had been greatly reduced in 



towns where the water of the soil had been artificially removed, 



and that it had not been reduced in other towns where the soil 



had not been dried. 



(5.) The whole of the foregoing conclusions combine into one — 



which may now be affirmed generally, and not only of particular 



districts — that wetness of soil is a cause of pMJiisis to the population 



living upon it. 



We have brought these reports under the notice of our readers, 

 because we consider them of great interest as showing the very im- 

 portant aid that a knowledge of geology may furnish in affording a 

 clue to the origin of pulmonary diseases. Similar valuable results may, 

 no doubt, be looked forward to in regard to the connection between 

 other diseases and the geological structure of a country — which will 

 give a new value to the published maps of the Geological Survey, 

 and greater stimulus to the study of the science ; it is extremely 

 interesting also to notice that many eminent medical men rank 

 among the foremost of our geological leaders. 



II. Gco-Theology. 

 I. TN 1810 Major-General Twemlow^ accidentally picked up some 

 JL chalk fossils, "which then gave him the impression that the 

 upheaved chalk downs must be part of the garment of the earth 

 renewed at the Deluge." Since that date he has been busy collect- 

 ing a series of specimens, which he illustrates and describes in the 

 volume now before us. They are from various localities, and from 

 different deposits, principally from the Chalk, and seem to have 

 been simply collected, without reference to the mode of their 



' Facts and Fossils adduced to prove the Delude of Noah, and modify the transmu- 

 tation system of Darwin, with some notices regarding Indus Flint Cores. By Major- 

 General George Twemlow. Illustrated with Photographic plates, 8to., pp. 256. 

 London : Simpkin & Co. 



VOL. VI. — NO. LVI. 6 



