REFERENCES TO SCIENTIFIC TECHNIQUE 57 



MACDOUGAL, ROBT. 



1905. On the Discrimination of Critical and Creative Atti- 

 tudes. Jour. Philos. Psy. and Sci. Methods, Vol. 

 II, pp. 287-293. 



LEBON, G. 



1898. The Life History of Scientific Ideas. Pop. Sci. Mo., 

 Vol. LII, pp. 251-254. 



2. Directions for Collecting and Preserving Specimens, Photo- 

 graphing, Surveying, and Other Phases of Technique 



There is such an abundance of literature on the 

 technique of collecting and preserving specimens, 

 and so much of it can easily be secured by any earnest 

 student, that space will not be taken to discuss 

 these subjects in detail. Reference will simply 

 be made to the main convenient sources of informa- 

 tion. It should perhaps be mentioned that very 

 few of these papers have been especially prepared 

 from the standpoint of the animal ecologist. The 

 student must select and devise his methods from all 

 available sources. 



I have included in this list a few references on 

 the subject of camping, photography, and the use 

 of instruments needed in the determination of the 

 physical features of the environment. A few mis- 

 cellaneous papers which are suggestive on methods 

 of technique are also added. 



MANY AUTHORS. 



1891-1899. Bulletin 39, U. S. National Museum. Parts 



A to 0. 



Contain directions for collecting and preserving a 

 great variety of animals, including marine animals, 



