12 



of Illinois", "Remarks on the discovery of a Terrestrial flora 

 in the Mountain Limestone of Illinois," and "Remarks on the 

 relative age of the Niagara and the so-called Lower Helderberg 

 groups." 



January 16, 1863, Prof. Worthen was made a member of the 

 "American Philosophical Society of Philadelphia." 



October 15, 1871, he was appointed correspondent of "The 

 Imperial Royal Geological State Institute of Vienna." 



April 17, 1872, he became a member of the "National Aca- 

 demy of Sciences, U. S. A." And on May 20, 1873, of the 

 "Societe Royale des Sciences de Liege." 



He was probably a member or correspondent of other learned 

 scientific bodies, but he was careless of such honors, paying 

 more attention to furnishing the scientific world through the 

 membership of these societies, with new facts and discoveries, 

 than to receiving from them indorsements or honors. Before 

 these scientific bodies he read or to them he communicated at 

 various times, important papers relating to his investigations 

 and discoveries in the Lower Carboniferous Limestones, some of 

 which will be found published in the transactions of the St. 

 Louis Academy of Sciences, of the American Philosophical So- 

 ciety of Philadelphia and in the American Journal of Science 

 and Arts, edited by Silliman, specimens of these communications 

 are found in his remarks on the age of the Leclaire Limestone, 

 at Leclaire, loAva, and Port Byron, Illinois, Vol. 33, Silliman's 

 Journal, and Remarks on the Age of the Goniatite Limestone 

 at Rockford, Indiana, Vol. 32, Silliman's Journal, a joint paper 

 by himself and the learned palaeontologist Prof. F. B. Meek, 

 whom he had so closely associated with himself in the Palseon- 

 tology of the Illinois Survey. 



Prof. Worthen was not given to "rushing into print" and ex- 

 cept for the purpose of preserving priority of description and 

 nomenclature of the fossils collected and described in the reports 

 of the Illinois Survey, seldom published anything unless he had 

 some important fact or discovery or well considered conclusion, 

 to present to the scientific world. 



The Illinois Legislature in February, 1851, passed an act 

 authorizing a geological survey of the State, appropriating 

 |3,000.00 a year for that purpose, and two years later increased ' 

 this appropriation to $5,000.00 per annum. Prof. Norwood, a 



