252 Penfield — Use of the Stereographie Projection for 



As an illustration of misconception concerning the projec- 

 tion, attention may be called to some statements and illustra- 

 tions observed in a Physical Geography intended, as stated on 

 the title page, u for the use of Schools, Academies and Col- 

 leges." In the chapter on Mathematical Geography the fol- 

 lowing statement concerning maps was observed : " The pro- 



Map of the Northern Hemisphere. 



jections in most common use are Mercator's, the orthographic, 

 the stereographie and the conical. Of these the stereographie 

 is best adapted to ordinary geographical maps and Mercator's 

 to physical maps." Then, after giving correctly the principles 

 upon which the stereographie projection is based, it is stated 

 that " the two stereographie projections in most common use 

 are the Equatorial and the Polar" while the accompanying 

 illustrations are not stereographie, but the so-called globular 

 projections of the hemispheres, which will be referred to later.. 



