since een te aad 
ACKNOWLEDGMENTS TO CORRESPONDENTS, FRIENDS 
AND STRANGERS, 
Remarks.—This method of acknowledgment has been adopt- 
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 assistance, in lines of duty, 
with which they presume us to be acquainted. 
The apology implied i in this remark, i drawn from us, that we may 
> the civilities of many respectable persons, au- 
thors, aoe 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 acknowledgments are made 
in these pages, which as sometimes be, in part, retrospective.— 
Eds. 
SCIENCE.—FOREIGN. 
First Annual Report of the Natural History Society of Dublin, 
Ireland, 1838, From the Society. 
An Address delivered at the 7th Annual Meeting of the Geol. 
Soc. of Dublin; by J. E. Portlock, F.R.S.G.S. Dublin, 1838. 
Journal of the. al Society 
1837. From the Society. — ee. 
Reports of the Council of the Belfast em History Society for 
1837, 1838. From the agen 
of Dublin, Vol. I, Part III, 
* 
