2i» Brigade-Major Kater on the Light, ^c, 



elusion perhaps derives additional force from a circumstance 

 noticed in most elementary works on optics, viz. that the sa- 

 tellites of Jupiter and his belts, may be distinctly seen with a 

 Galilean telescope, whilst with an astronomical telescope of 

 an equal aperture and power, they remain invisible. 



Ipswich, 22d April, i8i}« 





