132 The Am'ericnn Geohxjisc. Axigust, i«<.i(> 
necessity of choosing"between the two Marions proposed by Prof. Prosper, 
I viewed that first defined in his article, namely, the Marion flint and 
concretionary limestone as the established Marion and substituted for 
the other the name Geuda. In doing this I was fully aware that in an 
important sense the two stratigraphic values for the name Marion had 
been simultaneously proposed, having been defined in the same article, 
and that either might be retained as the valid one on the author's with- 
drawal of the other. 
Recent con-espondence between Prof. Prosser and myself has led to 
the substitution of a new MS. name by the latter for the previously so- 
called Marion member of the Chase. The term. Marion formation, is 
thus given an unclouded standing and I acknowledge its priority over 
any other for the formation next above the Chase. F. W. Ckagin. 
Colorado Springs, Colo., May SO, 1896. 
PERSONAL AND SCIENTIFIC NEWS. 
OBITUARIES. 
Gabriel Auguste Daubree: born June 25, 1814; died May 29, 1896. 
Little more than a year after the death of James D. Dana» 
Geology loses also Daubree of France and Prestwich of Eng- 
land. Each of these three geologists, the most eminent in 
their respective countries, had attained the ripe age of more 
than eighty years. 
Daubree was born at Metz, studied at the Polytechnic 
School in Paris, and began his life work as a mining engineer. 
At the age of twenty-five he was called to the recently estab- 
lished professorship of mineralogy and geology at Strasbourg, 
where he remained more than twenty years. In 1861 he suc- 
ceeded Cordier as professor of geology in the Natural History 
Museum in Paris; and later he became a professor in the 
School of Mines, from which, in 1884, he retired with the title 
of Honorary Director. 
"Much of his long life was devoted to the prosecution of 
chemical, physical, and mechanical experiments, whereby he 
sought, with singular success, to imitate in the laboratory 
many of the phenomena of nature. Light was thrown by his 
researches upon various subjects, which in an exceptional way 
need illumination; such as the origin of mineral veins, the 
thermal and dynamic metamorphism of rocks, and the nature 
and affinities of meteorites." 
The methods and results of these researches, originally 
published in many short papers, were gathered in 1879 to form 
the large treatise entitled ''Etudes synthetiques de Geologie 
Experimentale." The next year Daubree received from the 
Geological Society of London the Wollaston Medal, very ap- 
