420 The American Geologist, Jnne, 1894 
only of her own domain, but also of foreign countries, which 
allowed comparisons. 
Brazil had three small collections; Argentine, several, rep- 
resenting principally the copper and lead minerals and associ- 
ates. 
New South Wales had a large collection, numbering many 
hundred specimens, representative of most of the known 
groups, besides a few specimens of meteorites. Indeed, this 
section was unquestionably the largest and best exhibit in the 
Mines and Mining building. 
While the mineralogy of the United States was very suc- 
cessfully displayed, it should have been more thoroughly rep- 
resentative. Too much poor material was exhibited, and this 
may perhaps have been due to the fact that the governors or 
commissions of several of the states did not exercise good 
judgment in selecting representatives for the department of 
scientific mineralogy. 
REVIEW OF RECENT GEOLOGICAL 
LITERATURE. 
On the sedimentary origin of iron on deposits and itabiritt (Eisenglimmer- 
sehiefer). J. H. L. Vogt, Salten og Ranen, Kristiania, 1891, pp. 214- 
224. (Translated from the Zeitschrifl fur praktische Geologie, January, 
1894. pp. 30-35, by H. V. Winchell.) 
"Salten og Ranen" appeared in 1891 as the first pari of a geological 
description of the Norwegian province of Nordland, especially treating 
(if the marble beds and ore deposits (iron ore, pyrite and chalcppyrite, 
argentiferous copper ores, galena, etc.). 
The Tromsoe mica-marble group is always characterized by thick 
and extensive inclusions or interbedded deposits of iron ore (partly itabi- 
rite), which sustain a close relation with the immense limestone beds, 
and in the district examined by the author appear usually as separate 
strata immediately below the limestone, but sometimes contained in it. 
At Naeverhaugen the ore deposit, consist inn- of hematite, quartz, etc, 
in fine alternating layers, can be followed continuously for a distance of 
five miles. The thickness is variable, from 18 inches to 50 feet. Above 
it limestone sometimes occurs immediately ; sometimes there is a layer 
eighteen inches to three feel thick of "Skarnberg" schist. In the vicin- 
ity of the Naeverhaugen area the ore bed forms a peculiar, sharp S- 
curve, which reveals itself only by an overlap-fault, in the direction of 
the strike. 
