74 



"J'ai l'honneur de prósenter a rAcadémie \m nouveaii volume de la 

 "Collection des Savants du Jour entreprise par M. Eriiest Lebou. Ce vo- 

 "lume est consacré au Prósident actuel de l'Académie des Sciences, M. 

 "Emile Picard. 



"Comme les volumes précédents, celui-ci se recommande par une abon- 

 "dance dans les informations, une súreté dans les renseignements de tou- 

 "te nature qui feront de la CoUection de M. E. Lebon le guide le plus 

 ''précieux pour les futurs historiens de la Science. 



*'J'y signalerai plus particuliérement la charmaute Notice biogi'aplii- 

 "que qui ouvi-e le volume. Elle nous fait conaítre la jeunnesse de M. End- 

 "le Picard, ses premieres études et ses succés, puis ses découvertes et les 

 "principaux incidents de sa belle carriére scientifique. EUe insiste, comme 

 ''il convient, sur les incursions que notre Président a faites dans le do- 

 "maine de la pbilosophie des sciences et plus particuliérement siu" le beau 

 * 'Rapport qu'il f ut amené á écrire en 1900 sur Tensemble du progrés scien- 

 "tifique, a la demande du Commissaire general de l'Exposition universelle 

 "Internationale, notre cofrére Alfred Picard." 



The Thrust-Masses in the Western District of the Dolomites 

 (South Tyroi) by Mrs. Maña M.'Ogilvie Gordon, D.Sc, Ph.D.— 



Transactions of the Edmburgh Geological Society. Vol. IX. 

 Special Part. 1910. 8^ 91 pages, 2 geologieal maps, 18 coloured 

 geological sections, and a iiumber of original photographs and 

 sketches. 



Mrs. Gordon describes a series of gigantic tbrus-niasses composed, in 

 that district, of Permian, Triassic, Jarassic, and Cretaceus rocks that 

 have travelled from east to west above the older crystalline rocks of the 

 Central Alps, and have subsequently been downthrown along with the 

 older rocks and suff ered f urther def ormation in the región of the Dolomites. 

 The base of the series is composed of brecciated rock-material belonging 

 to the floor o ver which the subjacent mass has passed and to the lower 

 layers of the subjacent mass The lower layers of each mass differ from 

 place to place, as they were masses that had been already plicated in east 

 and west direction, and in the course of the overthrust movements new 

 plicational forms were superinduced both in north and south and in east 

 and west directions. Similarly the cross-faults intersect, or coalesce with, 

 the east- west, E.N.E-W.S.W. and W.N.W.-E.S.E. faults, and form fault- 

 networks which completely isolate the adjacent áreas in the crust. The 



