Marcou.] 
86 
[Nov. 7, 
months later, on March 21, as it is recorded in the library of the 
Boston Society of Natural History ; and as I have said in my paper 
“ The Taconic of Georgia and the Report on the Geology of Ver- 
mont. ” I continue to maintain that the date of publication of the 
Geology of Vermont instead of being Oct. 1, 1859, or Oct. 22, 
1860, or 1861, is the end of March, 1862. 
The errors of dates of the.Messrs. Hitchcock’s geological publi- 
cations, on which Mr. Charles H. Hitchcock bases his claims of 
priority against me, are obvious. I shall give one more example. 
The book and geological map of E. Hitchcock entitled : “ Outline 
of the Geology of the Globe and of the United States in particu- 
lar,” is claimed by Mr. C. H. Hitchcock in his paper “ The Geo- 
logical Map of the United States” (St. Louis, Oct., 1886) to have 
been published January 1, 1853 (date of the Introductory), which 
is the day when “ the manuscript and maps were delivered to the 
publishers.” On the back of the title-page, we read : “ Entered 
according to Act of Congress, in this year 1853, by Phillips, Samp- 
son and Co., in the clerk’s office of the District Court of the District 
of Massachusetts.” Having applied to the Librarian of Congress, 
at the copyright office where the registers are kept, I have received 
the following answer. 
Library of Congress , Washington , June 27, 1888 — Sir : In reply to your 
communication of the 25th inst., I have to advise you that Hitchcock’s 
“ Outline of the Geology of the Globe and of the U. S.” does not appear 
to have been entered for copyright by Phillips, Sampson and Co., in the 
District clerk office, District of Mass., in 1853. 
V ery respectfully, 
A. R. Spofford, Librarian of Congress. 
THE TWO EDITIONS OF THE GEOLOGICAL MAP OF VERMONT. 
Mr. Hitchcock tries to make me say that because I have spoken 
of two editions of his geological map of Vermont, I adopt the 
principle that the date of publication of a volume “ does not de- 
pend upon the issuance of the volumes in bound form. Excerpts 
that have been distributed or exhibited to scientific men before the 
appearance of the bound volume, are regarded as having been pub- 
lished. Thus he (Marcou) says of the general map in volume 2, 
‘ The map had two editions. The first one, distributed in De- 
cember, 1861, contains, etc.’ He (Marcou) allows that this map 
was published in 1861. Then the whole of Part ii (Report of 
Vermont) must have been published as early as September, 1861, 
