Bibliography. 449 
division of the work; and then follows a chapter on the general fea- 
tures _ existing phenome na of the earth’s surface. 
ort to the Louisiana State i ~—s onthe Metorniogs, 
. A 
perience of Life Insurance Companies in Louisiana, &c., b 
Heartt. 66 pp. 8vo. New Orleans, 1851.—Dr. Barton discusses in 
of mortality and its causes, and in each point of view, this pamphlet 
contains numerous facts of psd plang which we are prevented from 
te at this time by our limited sp 
. A. p’Arcutiac and J. Hatme: “Descripti on de la Formation Num- 
ante de ? Inde, précédée d’un*Essai d’une Monographie des Num- 
mulites.—The importance of the nummulitic formations of Europe and 
Asia, gives great interest toa work which like this of Messrs. Archiac and 
Haime proposes to cover the whole ground, embracing the descriptions 
of species and their geological relations. M. d’Archiac is the eminent 
author of the “ Histoire des Progrés de la Geologie,” a most elaborate 
work that should be in the hands of every — and M. J. Haime 
has been associated with Milne Edwards in several works on Cora 
Zoophytes. Their high reputation laiaiitaniicts and accuracy will 
commend the work to the geologists of this country. The names of 
subscribers are — by the publishers, MM. Gide and on aaa —_ 
a RD: ee lary 
Treatise of Recent pee Fossil Shells. 158 pp. with ps 
in the text, and 12 steel plates.—An elegant aa of en Pearly Nau- 
tilus, from Owen, forms a frontispiece to this excellent manual. e 
subject of Mollusca i is treated as a department of Zoology, the animals 
their structure, habits, and relations, as well as their shells being de- 
scribed with system and simplicity. ‘After a __: on a ee 
the wore Ss iodoeds toa description o the gen re pro 
species. The figures of species are thickly pic « ie ihe 12 an 
and are well made. 
annemora Jernmalmsfalt i Upsala Lén till dess geognostika 
beskaffenhet skildradt ett Férsék af A. Expmann. Afiryck ur K. Vet. 
Ukad. Handl. for Ar. 1850. 138 pp. 12mo, Doig 16 plates. Stock- 
holm, 1851.—The iron —_ of Damnemora are so famous as to give 
great interest to an account of them, eibeoualy: ee one so able as M. 
Erdmann. The author aeooute with care the geology of the regicm, 
and gives analyses of some minerals, with also mining statistics. 
sides the usual superficial survey, he enters very fully into an aecoust 
of the changes found in the veins or beds, at different depths of de- 
scent. These changes are illustrated in the plates, the form of the 
sses of iron ore being shown by colors, and the successive 
plates oxhibihig the variations of size and shape in these beds or 
It is curious to observe the enlargement or coalescence of 
certain of the isolated beds, i in the descent, and the disappearance or 
total change of character in others. Such plates show the nature of 
the whole mass and not merely its surface outline. Dannemora is 
situated near the small lake Dannemora, ate to 20 miles north of Up- 
~ The cone ge rock of the region is the rock called 
wp Serres, Vol. XIII, No. 39.—May, 1852. 
