30 REPORT OF THE 



formed of the amount of manipulation required for the perma- 

 nent and effectual labeling of the specimens. The subsequent 

 study of the specimens is still an additional labor. 



Besides the keeping of the book of localities, every observer 

 keeps a minute account of all his observations, written in a field 

 book on the occasion, while the objects are before him and all 

 their relations are fresh in his mind. Such inferences as the 

 state of facts is calculated to suggest, are put down at the same 

 time. Thus, though subsequent observations may materially 

 modify or reverse these conclusions, they at all times possess 

 the value of being the impression made upon the judgment, 

 with all the observed facts vividly before the mind. All these 

 notes are, at the end of the season, transcribed in order, in a 

 Note Book kept for the purpose. 



The third book kept is intended to show the geology of each 

 township of the State. Under the several counties are arranged 

 the townships in alphabetical order ; and opposite the name of 

 each, are references to every locality visited in it. Turning to 

 .these localities in the Note Book, all that has been learned of 

 the township is at once before the eye. 



Still another book is provided for memoranda, historical data, 

 office work, &c. Thus, by this extensive and minute system of 

 records and references, everything which has been done or 

 learned is at all times immediately accessible ; and no casualty 

 to the geological corps, could result in losses as serious as when 

 a large part of the data are left till the close of the survey, in 

 the custody of individual memories. 



The limited provision made for the prosecution of the survey, 

 has rendered it impossible to engage the services of a chemist 

 and mineralogist. The work of a geological survey — not inclu- 

 ding the zoology, botany, meteorology, and other researches 

 generally attached to it — embraces field observations, cellec- 

 tion of specimens, palaeontology, mineralogy and chemistry ; 

 and it is seldom that a single person is competent to do requi- 

 site justice to all these departments. It is always desirable, 

 therefore, to attach to the survey some suitable person to devote 



