OF NAUTICAL INSTRUMENTS. 



FIG. 863. 



FIG. 840. 



862. ffletal Sextant, with bridge handle, four telescopes and seven shades, divided on 



silver to ten seconds, with swing reflector, in polished mahogany case (fig. 862) 



10 10 



863. METAL SEXTANT, best triangular oval or diamond limb (fig. 863), complete as 



above 950 



864. ffletal Sextant, plain, flat limb, with three telescopes, seven shades, divided on 



silver to ten seconds, in mahogany case, a good plain practical instrument 



700 



865. EBONY SEXTANT, with best centre, three telescopes, seven shades and ground 



glass reflector, divided on ivory to fifteen seconds, in polished mahogany case 



4 15 



866. Box SEXTANTS, see Surveying Instruments, p. 70. 



867. Ebony Handle Quadrant or Half Sextant, divided on ivory to half minutes, 



with best centre, seven shades and vertical adjustment, in mahogany case 



3 15 



868. EBONY HANDLE QUADEANT, OB HALF SEXTANT, with plain centre 3 12 6 



869. BEST METAL QUADEANT, OB HALF SEXTANT, divided on silver to fifteen seconds, 



with best centre, seven shades, reflector, and adjusting screw, in mahogany 

 case . . . . . . . . 4 15 



870. METAL QUADEANT, divided on silver to fifteen seconds, with best centre, shades, 



etc., as above . . . . . 4 10 



872. ffletal Quadrant, with plain centre . . . . 450 



873. EBONY QUADEANT, plain, divided on ivory to one minute, in polished mahogany 



case . . . . . . . 1 17 6 



874. EBONY QUADEANT, double tangent (fig. 874) . . . 220 



875. Ebony Quadrant, double tangent, divided to one minute, with three back 



shades, and vertical screw adjustment, in mahogany case . 2 10 



