258 The American Geologist. October. 1894 
ijited represent the age and relations of all t lie formations on the east 
side of the Hudson river as •'Hudson river group or Lorraine shale" 
above the "Utica slate," with long bands and isolated patches of Tren- 
ton limestone, called on the map "Black River and Birdseye limestone." 
so the statement is incorrect. 
At p. 29 we read: "At a later period. 1844, Prof. Emmons published 
an agricultural and geological map of the state to accompany his agri- 
cultural report. This map was published upon the same base as the 
original geological map of the state. The coloration was almost pre- 
cisely the same on all parte of the map west of the Hudson river. From 
the northern limit of the state and the adjacent pari of Vermont, ex- 
tending along the east side of the Hudson river and crossing to the west 
side below Rhinebeck, a belt of color was introduced to show the sup- 
posed limits of the 'Taconic system' of rocks, although no mention of 
the name is made nor any indication in the colorlegend of the map. The 
map. however, is fully described on page 361 of volume [ of the 'Agri- 
culture of New York.' A description and discussion of the rocks of the 
Taconic system and of its individual members occupies chapter Ave, 
pages 45-1 12 of the volume. Since l$44 tin'" »'"i' has been tin only geologic 
calmap of the ■■</"ti of New York accessible to the student and to tin public." 
Tlie italicising of the last paragraph is mine. 
Dr. Emmons, in a published letter (Proceedings American Academy 
Arts and Sciences, vol. XII, p. 188, Boston) says: "I made and pub- 
lished with my Report while in the Survey of New York a modified map 
of the State, which showed the extent of t he Taconic rocks in New York. 
The three' thousand copies were stolen or destroyed by persons un- 
Known, so that they were never issued with the proper volume." So. 
instead of being accesrilAe, the geological map showing the extent of the 
Taconic system in New York was inaccessible, even to its author, profes- 
sor Emmons. Eyel), de Verneuil, Agassi z, colonel Jewett, Barrande, 
etc. never saw it. No student of the geology of New York ever saw 
that map until about 1877, when a few mutilated copies began to be 
distributed by the state librarian at Albany. 
Instead of being accessible to the student and to the public, as it is 
claimed, the map of 1844, paid for by the Slab', disappeared mysteri- 
ously until 1877, during a period of thirty-three years; and during all 
that time "the only geological map of the state of New York accessible 
to the student and to the public" was the geological map of 1843, on 
which all the strata containing the primordial fauna are placed above 
the Utica slate, thai is to say, above the second fauna. 
Mr. James Hall, the State geologist and stale paleontologist, adds, at 
p. 29*. "This agricultural and geological map of Dr. Emmons, following 
so soon after the publication of the state map accompanying the reports 
of the four geological districts, doubt less prevented any immediate eti'orl 
to secure the means of preparing Hnd publishing a more accurate geo- 
logical map of the state." How a map unknown and absolutely inac- 
cessible may have presented to prepare and publish a more accurate geo- 
logical map of the state of New York is a material impossibility. If an- 
