1899.] NATURAL SCIENCES OF PHILADELPHIA. 377 



Ou the occasion of his promotion to the grade of Commander he 

 wrts presented with his bust in white marble. The account of this 

 manifestation of high esteem enumerates twenty-five publications 

 i-elative to natural or medical sciences, and two hundred and 

 eighty -six concerning the mineral sciences. Some of these latter 

 related to mineralogy and paleontology, notably the description of 

 the fossils of the secondary formations of Luxembourg in collabora- 

 tion with F. Chapuis, crowned by the Academy in 1851. The 

 greater part are concerned with the geology of Belgium, notably 

 his notes on the Lias, in which he solved the question of the Sand- 

 stone of Luxembourg and of Hettange ; those on the anthracitic of 

 the Condroz, in which he assigned, after others, but often differ- 

 ently, the Devonian beds to the Eifelian or middle Devonian, and 

 the Famenniau or upper Devonian ; his discussion with M. Dupont 

 relating to the gaps which that observer admitted in the Carbonif- 

 erous limestone; on the plicated appearance of the beds of the 

 Ardennes; on the granite of Lammersdorf ; on mineral waters, es- 

 pecially of Spa; on the pudding-stone of the Baraque-Michel : 

 the origin of the labors which have demonstrated that the Tertiary 

 (Oligocene) sea covered the Ardennes; on the giant pot-holes of 

 the same region, and finally his i-emarkable geological map of 

 Belgium and the neighboring provinces on a scale of -^jfohrwuf ^^^ 

 minuteness of which does not prevent one from realizing the im- 

 mense progress accomplished since the death of Dumont, in the 

 corrections made on the German map in certain divisions of the 

 Devonian, and in the beds of Daleideu which are represented for 

 the first time. 



Prof. Dewalque has also published a coup d'oeil of the advance 

 of the mineral sciences in Belgium (1870) ; the Secular Report on 

 the Works of the Academy {Mineral Sciences, 1872), and the 

 Catalogue of the Works on Mineralogy, Geology, and Paleontology, 

 together ivith the Geological Maps tvhich are found in the Principal 

 Libraries of Belgium, issued by the Geological Society in 1884. 



Monazite in Delaware County, Pa. — Mr. S. Harbert Ham- 

 ilton stated that the occurrence of crystals of Monazite in the 

 feldspar of the ancient rocks of eastern Pennsylvania had been 

 reported to the Students' Mineralogical Club by Mr. J. Glading 

 Dailey. 



Monazite has been noted previously from several localities in the 



