BIBLIOGRAPHY AND INDEX OF NORTH AMERICAN 
GEOLOGY, PALEONTOLOGY, PETROLOGY, AND MINER- 
ALOGY FOR THE YEAR 1896. 
By Fred Boughton Weeks. 
INTRODUCTION. 
The method of preparing and arranging the material of the Bibliog- 
raphy and Index for 1896 is similar to that adopted for the previous 
publications on this subject (Bulletins Nos. 130, 135, and 146). A 
number of periodicals and transactions of societies not heretofore 
examined are included in the present work, and are given in the list of 
publications examined. Several papers that should have been entered 
in the previous bulletins are here recorded, and the date of publication 
is given with each entry (see page 98). 
Bibliography. — The bibliography consists of full titles of separate 
papers, classified by authors, an abbreviated reference to the publica- 
tion in which the paper is printed, and a brief summary of the con- 
tents, each paper being numbered for index reference. The extent 
of papers less than a single page in length is indicated as J p., 5 1. 
(lines). 
Index. — The subject headings, their subdivisions and arrangement, 
are shown in the Classified Key to the Index. They comprise geo- 
graphic, geologic, mineralogic, paleontologic, and petrologic subdivi- 
sions. Under Economic Geology is given a list of useful minerals and 
ores described in publications examined ; under Mineralogy, a list of 
minerals described in such publications; under Paleontology, a list of 
genera and species of fossils therein described, and under Petrology, 
a list of rocks described, reference being made in each case, by author's 
name and number of article in the Bibliography, to the paper in which 
the fossil, mineral, or rock is described. 
9 
