THE AMERICAN NA TURALIST. [Vol. XXXV I L 



between the centrum and the shore are sufficient in most cases 

 forabogof, say, 10 acres. 



The collecting often has to be done under great difficulties on 

 account of the swampy character of the peat, which is often of 

 so loose a consistency, that it is impossible to open a hole to any 

 depth. In this case an earth-auger or soil-sampler, has to be 

 employed. Of these instruments there are many kinds in use. 

 One of the best for prat sampling purposes, that has come under 



the obse 

 Kellgrer 



of the 



as described 



iS(,4 



The lower end of the pipe will thus 

 be filled with the earth which the 

 auger retains, when withdrawn. In 



lolds them together. Wh< 

 , thus allowing the sample 



