394 Scientific Intelligence. 
can ascend to the top, spend several hours, and return to camp to 
sleep. On the third day you can reach Kapapala ranch before 
night. It is also now probable that the same could be done from 
Kilauea as a base.’ 
weeks, 
as been able to procure a small number of colored copies for dis- 
tribution, one of which is now before us. The legend of the map 
informs us that the geological details for Canada, comprising the 
former provinees of Upper and Lower Canada (now Ontario and 
Quebec) are furnished by the Gealogioal Survey under the direction 
of Sir William E. Logan. He has himself compiled the geology 
of the various states of the Union under the supervision of Prof. 
Hall from various sources which are mentioned in detail in the 
preface to the Atlas of the Geology of Canada; (published in 1865) 
where he tells us that this portion of the w as done “with the 
approval of Prof. James Hall,who has freely pone all sie materials 
at the disposal of the compiler, and aided by his intimate perso 
ens - - geology of a greater part of the region repre- 
e geology o of the province of New Brunswick, 
avs Beotia : = Newfoundland, also, the most authentic printed 
and manuscript maps were consulted, as described in the Atlas 
just referred to. 
An indispensable preliminary to a work of this kind was a cor- 
rect topographical map, and such a one for Canada had to be slow- 
ly and laboriously constructed. The sources of se maar for this 
purpose are given at length in ake preface elready sage A se- 
ime the beantifal aoe: accurate a 
