45, CORNHILL, E.G., AND 122, REGENT STREET, W., LONDON. 



225 



VARIOUS OPTICAL INSTRUMENTS, 



FIG. 743. 



FIG. 741, 



FIG. 742. 



713 Concave and Convex Mirrors, Silvered Glass, in turned 



Wood Frames 16s., 21s., 



714 Multiplying Mirrors 10s. 6d. 



715 Black Mirrors, for Artists 



716 Burning Glasses, in Horn mountings . . .2s. 



717 Glass Prisms, for showing Decomposition of Light, 



of various sizes . . . ' . . 2s. 6d., 5s. 



718 Glass Prisms, two in a neat box for exhibiting the 



Decomposition of Light into the Prismatic Colours 

 and their Recomposition into White Light, &c. 



719 Prism Compound of Flint, Crown, and Plate Glass 



720 Prisms mounted with Ball and Socket joint adjustment 



on Brass foot . . , 



721 Hollow Glass Prism, for experiments on the refraction 



of Fluids, and for Spectroscopes .... 



722 Multiplying Lenses, in frame .... 2s. 6d. 



723 Claude Lorraine Glasses, for studying the effect of 



colour upon Landscapes, &c 



724 Colour Tops, a simple contrivance for exhibiting the 



recomposition of white light from colours 



725 Apparatus for ditto ditto, on a larger scale, with 



multiplying wheel, on Stand with Circular Prismatic 

 Disc (fig. 725) 



726 Kaleidoscopic Colour Top, with perforated discs 



and coloured diagrams, complete ; in box . 



727 Concave Lenses, in frame, for viewing Engravings, &e. 



Each. Each. 



s. d. s. d. 



220 

 150 

 110 



026 



1 1 

 030 



15 6 



500 

 1 10 

 1 16 

 050 



10 6 160 



066 

 1 10 6 



1 16 220 



1 10 

 050 



1 1 

 10 6 



2 10 



12 6 110 



0-10 6 to 2 2 

 Q 



