1878. | Scientific News. 767 
metrica, offered in exchange. Jos. McKay, 24 Liberty street, 
A variety of interesting objects from the Bahamas, mounted or 
unmounted, for exchange. C. C. Merriman, Rochester, N. Y. 
:0: 
SCIENTIFIC NEWS. 
— We learn from the parties in the field in the Yellowstone 
National Park, that the work of Prof. Hayden’s United States 
Geological Survey of the Territories has progressed most favor- 
ably despite the unsettled nature of the country, owing to the 
Indian troubles. The general features of the park have been 
n 
morainal eee and especially the structure of the Wind 
River mountain 
Meanwhile ike reports of the survey, and particularly the Geo- 
logical map of Colorado lately issued by this Survey, are winning 
golden opinions in Europe. entleman writes us from Paris 
as follows: “ The Hayden Survey is popular in both ae and 
France. I repeatedly heard expressions of regret that there 
should be any disposition to hamper or oppose it in any way. 
Such opposition would be looked on here as springing, without 
doubt, from unworthy motives.” An elaborate notice by Mr. 
Oldham, the late distinguished director of the Geological Survey 
of India, appears in the Geological Magazine, in which the highest 
praise is given to the work. That all Americans should take 
pride in this great work and others of the kind, is made apparent 
by the favorable notices which have appeared in European jour- 
nals. In letters lately received at the office of the survey, Prof. 
Andrew C. Ramsay, the veteran director of the Geological Sur- 
vey of Great Britain, writes: “I have to-day received a copy of 
your Colorado Atlas, for which I am exceedingly obliged. I 
have all the maps, etc., spread out on one of the large drawing 
tables in the geological survey office, and have had a long look 
‘at them. The beauty of the engraving and coloring is most 
remarkable, and 8 astonished me. I know nothing of the 
kind superior, or even equal to this work, especially when we 
consider the physical shanty of the country and the enlarge 
that such a survey must entail. That so much has n done 
and done in such a manner, speaks volumes for the faints and 
skill of you and all your men, and it is a credit to any govern- 
ssi to have been the means of producing such a masterly piece 
work.” 
Pr p ier e director of the Geological Survey of 
Scotland, writes: “ Your magnificent Atlas of Colorado has just 
come. I e had time piei to look over the maps and sec- 
tions in a cursory way. But I cannot delay.to send you a few 
