268 Penfield — Use of the Stereogram hie Projection for 



kinds may be made on them. The hemispheres shown in 

 figures 4, 8 and 9 were drawn by the writer with much pains, 

 the diameter of the originals being one foot. They are 

 approximately correct, but by constructing meridians and par- 

 allels for every degree, and making use of the best coast sur- 

 veys, there is no reason why, on a map of a hemisphere one 



15 



Stereographic Map of the inhabited portions of the World, extending from 

 the North Pole to 60° south of the Equator. 



foot in diameter, the outlines of all accurately surveyed land 

 areas should not be traced within a quarter of a degree of 

 their true geographical position. The drawing of the parallels 

 and meridians for every degree should be for the guidance of 

 the engraver ; every tenth degree only should be shown on the 

 completed map. The location of cities should be not far from 

 live miles from their true position, and the maps should not be 

 crowded by too much detail. Accurate maps as just described 

 should have distinct educational value, and would open up new 



