92 Frazer on Int. Cong, of Geologists. 
" Descriptions of excursions to Florence, to Pisa, to Carrara, 
Ravin de la Morra, Gabbro, and Orciano Pisano. Next fol- 
lows the essay on a project of unification of graphic methods in 
geological maps, by Albert Heim, professor of geology at Zu- 
rich. 
This essay occupies 57 pages, is illustrated by four colored 
plates, and won the first prize. 
Following this is the essay which won the second prize, by 
A. Karpinsky, professor at the School of Mines in St. Peters- 
burg. It fills nineteen pages and has six colored plates. The 
essay of M. Maillard which received the third prize occupies 
53 pages and is illustrated by two colored plates. 
A catalogue of the various works offered to the Congress 
completes the third part of this volume. 
The fourth part contains the report of the national committees 
forwarded to the international committees. These came from 
Austria, Belgium, Spain and Portugal, France, Great Britain 
and Ireland, Hungary, Italy, Russia, and Switzerland. 
Following these are reports presented by their secretaries 
from the three international committees, to wit: by Dewalque 
on geological nomenclature, etc.; by Renevier on graphic 
methods of geologic representation ; and by Douvill^ on the rules 
for establishing a nomenclature of species. The reports from 
individuals are added; "On nomenclature and coloring," by 
Selwyn; "On coloring and notation of geological maps," by 
de Cortazar; letter of Mr. Hilgard; "Modifications proposed in 
geological nomenclature," by W. J. McGee; "Unification of 
nomenclature," by R. Owen; "General nomenclature and con- 
ventional symbols," by J. W. Powell; " Rdsumd of a communi- 
cation on geological nomenclature and a stratigraphic scale," by 
N. H. Winchell; "R(;sum<5 of the Cambrian rocks of New 
Brunswick," by Matthew and Bailey; "On coloration and the 
use of conventional signs," by de Hantken; "On the coloration 
of geological maps," by Medlicott; and "A system of colora- 
tion of geological maps," by Avanzi. 
The volume of the Bologna session contains 661 pages and 
might well serve as a model of the most perfect typographical 
art which our age can produce. The color printing, from the 
seal of the Congress on the first page to the color plate facing 
