£ s. d. 

 Wollaston's Ciimera Lucida, with large field and fittings to 



Eye-piece 10 



Erecting Glasses, with which, employing the two-thirds inch 

 Object-glass and Eye-pieces No. 1 and 2, the mag- 

 nifying power will range from 5 to 150 linear 1 



Large Bull's-eye Lens on stand 110 



Smaller Condensing Lens, with ball and socket fitting, to 



apply to No. 1 or No. 2 Microscope 18 



Smaller Condensing Lens, on stand, and complete move- 

 ments 12 



Side Silver Reflector, with fittings to limb, or on a separate 



stand .^ 1 1 



Amici's Prism for oblique light, mounted on a stand 2 2 



Polarizing Apparatus, of two Nicol's prisms with revolving 



fittings, and one selenite film 2 10 



Barker's Series of Selenites, with stage and revolving fittings 2 2 

 Two Double Image Prisms and Selenite Film, with fittings 



to Eye-piece and brass plate with holes 2 2 



Crystals to show rings round the optic axis and fitted to 



Eye-piece each from 10 6 



Tourmalines from 10 



Brooke's Double Nose-piece 1 10 



Compressorium 10 



Wenham's Compressorium for Parabolic Reflector 0/6 



Screw Live Box 14 6 



Large plain Live Box 8 6 



Small plain Live Box 6 6 



Large Glass Trough, with wedge and spring complete 8 6 



Small Glass Troughs from 5 



Set of three Glass Tubes 2 6 



Glass Plates, with hollows and ledges from 16 



Three-pronged Forceps and Joint 8 6 



Large Brass Pliers and smaller ditto 5 and 2 6 



MICROSCOPE TABLES. 



Handsome Walnut-wood Table, to revolve on carved pillar 

 and claw, with plate-glass top, and apparatus 

 packed in the drawers, as shown at the Exhibition 25 



Walnut-wood Table, with improved revolving fitting, on 



handsome pillar and claw, with leather top 8 8 



Iron Table with revolving top 5 5 



MICROSCOPE LAMPS. 



Improved small Camphine Lamp, with glass cap, to prevent 



evaporation of the spirit when not in use 2 2 



Best Argand Lamp, with blue chimney, for burning oil 1 5 



Gas Lamps made to order. 



