umes, are all the result of the untiring—nay, almost Herculean efforts 
of an individual mind, continued amid the harassments of constant 
professional duty, during a period of ten years ; we’ are encouraged to 
hope that we may yet see the day, when the united efforts of our small 
army of working geologists now laboring in the common cause, shall 
reduce the: oe = iy ype — to an Pree 
RaCyatenE 
mse mmaqeee will come again tanita eager hb and 
space shall give us an opportunity to review their contents in a way 
dit — better —_ uses sae value,” haw: is now ened 
rah 16: Fifth potatoe ines on the fasting of Tidhegeics : by 
Henry D. RocErs, state geologist. Harrisburg, 1841. 8vo. pp. 179. 
* Report of the progress of the Geological Buitbey of the state of Vir- 
for the-year 1840 3 by ing B. me aprey Professor of Natu- 
ral Phi > U , ~ Richmond, Va. 1841. 
fedenen= ee vit eae mae ibis +t egy 
Fifth Sleep agate to the 2 Now. 
1839 ; by G. Troost, M. D. siesta thesia u,b. 
The great number of geological laborers now in the field, in this 
rove acting under the legislative ‘patronage of the various states, 
tion of facts, and a publication of results so 
frequent and voluiminows, that ‘it requires espana sd industry 
was instituted, that their public servants are 
net remiss in the fulfillment of their duty. af 
‘With this view, peculiar prominence is given to the economical ge- 
nr aaaionsign:. ial the: nega - eae. deposits 
nes. and their 
tal progres of he works and give Gril te toplist 
the commission 
i ive pail 
