This is the telescopic 
appearance of Mas'S,, 
as show n in the Cly- 
lopediae, except,that 
die polar rngs are 
somewhat farther ea* 
tended than in tins 
plate. 
© This is the telescopic 
appearance of Mara,, 
'found in Ferguson, al¬ 
luded to in my third 
The preccd.ng diagrams are not well pro- 
portioned, having used my pen-knife only m 
cutting them. 
Of the first diagram, from the most northerly 
or extended part of one of the verges or ends 
of the outermost sphere, draw a short line per¬ 
pendicularly through the sphere and parallel to 
the axis of the diagram, from which line, half 
way through the sphere and towards that part * 
of the verge or tip end of the sphere nearest the 
axis, draw a short line at right angles with the 
first line, then the starting point from where 
the first line was commenced to he drawn, will 
constitute our ninetieth degree, from which 
point round to the termination of the last drawn 
li.ie. at the tip end of the sphere, will be 90 
shut degrees, and from that point round o the 
termination of the first drawn line just within 
the sphere, will be other 90 short degrees, and 
from that down to the internal equator, 90 con¬ 
cave degrees will be counted—so that in pas¬ 
sing on any given meridian quite round through 
the polir openings, one would traverse 720° of 
real Latitude ; yet it is probable the laws of re¬ 
fraction would operate so forcibly in the air, 
which must be densely compressed between 
the spheres, as to indicate ty celestial observa¬ 
tion, latitudes very different from reality. 
.1, C. 8. 
-**•35551, n e 9 ® ® 3 e s 
