B REFERENCES. A Telescope Tube . B Counterpoise Weight- E Brass Tube, sliding into place of Eyepiece. THE 31873 ASTRONOMICAL REGISTER: A MEDIUM OF COMMUNICATION FOR AMATEUR OBSERVERS, AND ALL OTHERS INTERESTED IN THE VOL. IV. NOS. 37 TO 48: JANUARY TO DECEMBER, 1866. LONDON: J. D. POTTER, 31, POULTRY, & 11, KING ST., TOWER HILL, 1867. |