REDUCED LIST OF PRICES FREE. 
THE EDUCATIONAL REFLECTING TELESCOPE, with Silvered 
Glass Mirror 4^ in. diameter, 5 ft. focus, mounted on a Parallactic Stand for 
following the heavenly bodies with one motion by means of an endless driving- 
scrtw and Hook’s joint, with two eye-pieces. 
PRICE £ 22 . 
Powers can be used up to 400 diameters on many stars with advan age. 
Sixth Edition, with much New Matter, 
A PLEA for REFLECTORS; being a Description of the New Astronomical 
Telescopes, with silvered glass specula, and instructions for using and ad- 
justing them, with many Illustrations and Coloured Frontispiece of Jupiter. 
By JOHN BROWNING, F.R.A.S. One Shilling, post free. 
JOHN BROWNING, 
Optical and Physical Instrument Maker to H.M. Government. 
63, STRAND, LONDON, W.C. 
BROWNING’S 
ASTRONOMICAL TELESCOPES 
