286 Scientific Intelligence. 



that Bowie's contention is probably correct; for reasons which 

 I will subsequently explain, I consider that the evidence available 

 favours the view that the Gangetic deposits are compensated. ' ' 



Burrard stated that in 1912 he put forward for the considera- 

 tion of geologists the suggestion that a rift had opened in the crust 

 at the foot of the Himalayas and had formed the Gangetic trough 

 and that it had been filled by abnormally light material. Bowie, 

 on the other hand, stated that the evidence at hand made it possi- 

 ble to account for the gravity anomalies on the Cenozoic forma- 

 tion in the affected area. 



Burrard makes a number of computations, the results of which 

 are given in this publication, showing the effect of the excess and 

 deficiency of density that occur in different geologic formations 

 extending below sea level. In his computations he assumes that 

 the light rock deposits of Gangetic troughs are isostatically com- 

 pensated and he examines whether the observed geodetic results 

 support this assumption or not. After making his computation. 

 Burrard concludes that the geodetic evidence in India supports 

 the view that the Gangetic trough is isostatically compensated. 

 This is a confirmation of the views held by geodesists in America 

 that probably all parts of the earth would be found, after investi- 

 gation, to be in the same state of isostatic compensation that we 

 have in this country. An appendix to the report gives details in 

 regard to the computation of the depth of the Cenozoic formation 

 at the various gravity stations that would be necessary to account 

 for the anomalies. 



The reviewer commends this report to the careful attention of 

 geophysicists and geologists as it is certain that the data furnished 

 by the geodesists in their investigations should be carefully con- 

 sidered in formulating theories as to the crustal movements of 

 the earth. w. b. 



3. Connecticut Geological and Natural History Survey. 

 Three Bulletins have recently been issued by the State Geologi- 

 cal and Natural History Survey, These are : Bulletin 29, The 

 Quaternary Geology of the New Haven Region; by Freeman 

 Ward. 78 pp., 17 figs., 9 pis., 1920. — On the basis of two seasons' 

 field work, Dr. AA^ard has prepared a detailed account of the 

 glacial features about New Haven, with especial attention to the 

 source, composition, and manner of deposition of the till, stratified 

 drift, and clays. Evidence is presented of two advances of the 

 ice but no deposits or erosion features indicating an interglacial 

 epoch were found. The glacial history of the New Haven region 

 is similar to that of other parts of the Connecticut coast but 

 unlike that of the central AYest. Dr. AVard's paper will therefore 

 find a place in comparative studies. 



Bulletin 30, Drainage Modifications and Glaciation in the Dan- 

 hury Region, Connecticut; by Ruth Sawyer Harvey. 59 pp. 

 5 pis., 10 figs., 1920. — Detailed study of Eocky River, Umpog 

 Brook, and of the reversed Still River, supplemented by an exam- 



