Obituary—Dr. F. V. Hayden. 143 
MISCHIMANHOUS 
British PrerroGRapHy. 
Ir may interest our petrological readers to learn that the remaining 
portion of Mr. Teall’s admirable “ British Petrography” is in the 
press, and will shortly appear. The issue in monthly parts, as 
originally contemplated by Mr. Teall, had, in consequence of an 
unforeseen contingency, to be discontinued. The firm of publishers 
that had undertaken to bring out the work became involved in 
financial difficulties, and ultimately failed, placing Mr. Teall in the 
remarkable predicament of having to purchase a portion of his own 
book. We are happy to be able to state that the work is now in 
good hands, namely, those of Messrs. Bemrose & Son, and is only 
awaiting the completion of a few of the plates, before being given 
to the scientific world. We must congratulate the author on having 
brought to a favourable conclusion an undertaking as comprehensive 
in design as it is thorough in execution. The 200 pages which have 
already appeared, replete with accurate and minute description, well 
furnished with references to original sources and illustrated by plates 
of surpassing beauty, have been sufficient to place the book in the 
front rank of petrographical literature, among such classic compeers 
as Fouqué and Lévy’s “Minéralogie Micrographie,”’ Rosenbusch’s 
«« Physiographie der Mineralien und Gesteine,” and Zirkel’s “ Lehr- 
buch der Petrographie.” 
(GS LIE OPP NS Nae 
FERDINAND V. HAYDEN. 
Born SEPTEMBER, 1829; Diep 23rp DrcemBer, 1887. 
Dr. F. V. HaypEen was born in Westfield, Mass., in 1829. He 
was a graduate of Oberlin College, Ohio, and received the degree of 
Doctor of Medicine from the Medical School of Albany, N.Y., in 
1853. He was surgeon in the army during the civil war ; and after 
it for seven years, he held the position of Professor of Mineralogy 
and Geology in the University of Pennsylvania. 
But the larger part of his time, from 1858 to the close of 1878, an 
interval of twenty-six years, was spent in Rocky Mountain explora- 
tion, in which his special work was geological; and through his 
labours and the investigations of those associated with him, a wide 
extent of territory, until then little studied, was examined geologi- 
cally and topographically. Coal-beds were found and a new coal- 
flora made known, new fossil Mammals, Reptilia, and Fishes, in 
great numbers, were collected and described, the stratigraphy and 
paleontology of the Cretaceous and Tertiary and the intermediate 
Laramie or Lignite beds were well investigated, and the Yellowstone 
Geyser region brought to notice and explored. 
Dr. Hayden’s personal work consisted in a general geological 
reconnaissance of the regions visited, the collection of fossils, which 
was the chief object of the earlier expeditions, and the supervision 
and direction of the surveying parties. He was the first to make 
known the facts as to the vast Tertiary lake-areas of the summit 
