MA CIINT PUBLICA TIONS. 761 
tion of the present survey. The third part of the report referred to 
above (by Dr. E. B. Mathews), is a careful bibliography of the publica- 
tions, both textual and cartographic, touching the geology and natural 
resources of the state. These chapters, which constitute the strictly 
geological part of the volume, are prefaced by a chapter which sets 
forth the plans and purposes of the survey — a chapter well worth the 
perusal of those who are charged with the organization or execution of 
such surveys. 
Part V is areport by Dr. L. A. Bauer on the magnetic work in 
Maryland, and includes a sketch of the history and objects of magnetic 
surveys. Dr. Bauer has determined the magnetic elements at a num- 
ber of points, and has brought together all data which are now known 
concerning this interesting subject, so far as applied to the state. 
The volume is illustrated by seventeen well-executed plates and 
maps, among which are a geological map of the state as now under- 
stood, an isogonic map, and a map showing lines of equal magnetic 
inclination .and the preliminary lines of equal magnetic force (for 
January 1897). 
The volume is to be commended not only for its contents, but for 
the excellence of its typographic work. In this respect it is in pleasant 
contrast with the cheap volumes sometimes issued by similar organi- 
zations. Regs S. 
RECENT PUBLICATIONS. 
—ANDRE#, PROFESSOR DR. Die Foraminiferen-Fauna im Septarienthon 
von Frankfurt a. M. und ihre vertikale Verteilung. Frankfurt a. M. 
Germany, 1894. 
Annales de la Société Geologique de Belgique. May 1897, Liege, Bel- 
gium. 
—Annual Report, Department of Minesand Agriculture, New South Wales, 
for the year 1896. Sidney, Australia, 1897. 
—ASHE, WILLIAM WILLARD, Assistant in Forestry, North Carolina Geo- 
logical Survey. The Possibilities of a Maple Sugar Industry in 
western North Carolina. Winston, N. C., 1897. 
—BAIN, H. F. Geology of Polk County.—lowa Geological Survey, Vol. 
VII. Des Moines, Ia., 1897. 
—BAKER, FRANK COLLINS. Onthe Modification of the Apex in Gastropod, 
Mollusks. Reprinted from the Annals of the New York Academy of 
Sciences, IX. 1897. 
