PREFACE. 
XI 
First, circular maps, and consequently general, under 
which are comprehended equatorial and meridional pro 
jections, orthographic, stereographic, and globular. And 
to these we have added horizontal projections, first with 
meridians and parallels ; and, secondly, with azimuth 
lines. 
Secondly, maps of a mixed projection, that may be 
either general or particular. In these the meridians and 
parallels may be straight or curved lines, but both must 
not be straight in the same map. 
Thirdly, straight-lined maps, which may be either 
general or particular, as, for example, Mercator s map, or 
the ancient way of laying down places by their positions 
and distance. 
All these methods are comprehended in the following 
table of contents, and they are fully illustrated in the 
body of our Manual of Map-Making and Mechanical 
Geography.