o ‘3 
, 
ACKNOWLEDGMENTS TO connespoxpents, FRIENDS 
AND STRANGERS. 
Remarks.—This method of on has been siopt- 
ed, because it is not always practicable to write letters, where 
they might be reasonably expected; and still more difficult is it 
to prepare and insert in this Journal, notices of all the books, pamph- 
__lets, &c., which are kindly presented, even in cases, where such no- 
_~ tices, critical or commendatory, would be appropriate ; for it is often 
equally impossible to command the time requisite to frame them, or 
even to read the works; still, judicious remarks, from other hands, » - 
would usually find both acceptance and insertion. 
In public, it is rarely proper to advert to personal concerns; to 
excuse, for instance, any apparent neglect of courtesy, by pleading 
the unintermitting pressure of labor, and the numerous calls of our 
fellow-men for information, advice, or santas in lines of duty, 
with which they presume us to be acquainted. © 
‘The apology, implied in this remark, is drawn rite us, that we may 
“not seem inattentive to the civilities of r many respectable persons, au- 
thors, editors, publishers, and others, both at home and abroad. It 
is still our endeavor to reply to all letters which appear to require an 
answer; although, as a substitute, many ackno knowledgments are made 
in these pages, which may sometimes be, it in ent retrospective.— 
Eds. geen 
, screncx:—yorniait ing 
Account of the Museum of Economic Geology and Mining Re- 
cords Office sapien by government in the department of her 
Majesty’s Comm s of Woods and Forests, under the direc- 
se a E.R. S., F. G.S.; by T. Sop- 
On the theor y and constenction: ror a Seris smour, or instrument for 
measuring earthquake Bre and other concussions; by James D. 
Forbes, Esq., F. R. S., &c. From the Transactions of the Royal 
Soc. of Edinburgh, Vol. XV, part 1, 1841. From the author. 
n a remarkable structure observed by the author in the ice of 
r glaciers : by J. D. Forbes, Esq., with a plate. Read before the 
~ Royal, Society of Edinburgh, 1841. From the author 
Observations on the Kutora Borealis from Sept. 1834, to Sept. 
1839 ; bY Robert Snow, Esq. London, 1842, From the author. 
