A REFERENCE LIST OF SUMMARIES OF LITERA- 
TURE ON NORTH AMERICAN PRE-CAMBRIAN 
GEOLOGY, 1892 TO THE CLOSE OF 1808: 
In the Archean and Algonkian Correlation Paper, by C. R. 
Van Hise (Bulletin 86, U. S. Geol. Survey, 1892), North Ameri- 
can pre-Cambrian literature was fully summarized from the time 
of the earliest publications to 1892. Since 1892, summaries of 
pre-Cambrian literature have been published from time to time 
in the JOURNAL OF GEoLoey by C. R. Van Hise, and have lately 
been continued in the same periodical by ‘©. kK Leitha ihe 
summaries thus far published are supposed to cover the field ot 
pre-Cambrian geology for North America from 1892 to the close 
of 1898. To facilitate reference to the summaries and original 
articles there is given below a list of the articles summarized, 
arranged alphabetically according to authors’ names, together 
with the volume and page of the JouRNAL in which the summary 
appears. At the end there will be found a list of the principal 
regions of pre-Cambrian exposure, and under each region the 
names of the men whose articles on the pre-Cambrian of that 
area have been summarized. 
The summaries here listed and those to follow for the years 
1899 and 1900 will serve as a basis for a bulletin, to be issued 
under the joint authorship of C. R. Van Hise and C. K. Leith, 
supplementary to Bulletin 86, U.S. Geol. Survey. It is probable 
that there are a number of omissions and errors in the summaries 
listed, and it is hoped by sending out this bibliography that a 
number of them may be noted and brought to the attention of the 
* The summaries have appeared in the JOURNAL OF GEOLOGY as follows: 
Vol. I, 1893, pp. 304-314, 532-541. 
Vol. II, 1894, pp. 109-118, 444-454. 
Vol. III; 1895, pp. 227-236, 709-721. 
Vol. IV; 1896, pp. 362-372, 744-750. 
Vol. VI, 1898, pp. 527-541, 739-753, 840-854. 
Vol. VII, 1899, pp. 190-205, 406-425, 702-708. 
790 
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