Bibliography. 3S5 



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 whole of our wide-spread territory to an intelligible and per- 

 fect system. 



These volumes will come again under our notice, when time and 

 space shall give us an opportunity to review their contents in a way 

 that will accord better with their sterling value, than is now possible. 



16. Fifth Annual Report on the Geology of Pennsylvania ; by 

 Henry D. Rogers, state geologist. Harrisburg, 1841. 8vo. pp. 179. 



Report of the progress of the Geological Survey of the state of Vir- 

 ginia for the year 1840 ; by William B. Rogers, Professor of Natu- 

 ral Philosophy in the University of Virginia. Richmond, Va. 1841. 

 8vo. pp. 132. 



Reports of Messrs. Beck, Conrad, Mather, Emmons, Vanuxem 

 and Hall, on the progress made in the geological examination of the 

 state of Neio York, during the year 1840. (Assembly document. No. 

 150.) Albany, Feb. 17th, 1841. 8vo. pp. 184. 



Annual Report of the Geologist of Maryland, for 1840 ; by J. T. 

 DtjcateJj, state geologist. Baltimore, Jan. 1, 1841. 8vo. pp. 59. 



Fifth Geological Report made to the Assembly of Tennessee, Nov. 

 1839 ; by G. Troost, M. D. Nashville, Tenn. 1840. 8vo, pp. 75. 



The great number of geological laborers now in the field, in this 

 country, acting under the legislative patronage of the various states, 

 causes so great an accumulation of facts, and a publication of results so 

 frequent and voluminous, that it requires no small amount of industry 

 and activity to keep up with the progress of things. Fully to elucidate 

 the views and inferences of the various able men engaged in these re- 

 searches — to understand all their reasonings and reconcile their dis- 

 crepancies — would demand a separate journal devoted exclusively to 

 these objects. It is generally understood that the annual reports, of 

 several of the States at least, are intended principally to show the] grad- 

 ual progress of the work, and give evidence to the people under whose 

 authority the commission was instituted, that their public servants are 

 not remiss in the fulfillment of their duty. 



With this view, peculiar prominence is given to the economical ge- 

 ology — the strictly utilitarian part, the discovery of valuable deposits 

 of metallic ores, and limestones, and quarries of useful stones, and their 

 chemical constitution, as well as that of the soils and peats. It is 

 to the final reports that we are to look for the comprehensive generali- 



Vol. XLi, No. 2.— July-Sept. 1841. 49 



