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48
NEWTON & CO., Opticians to the Royal Family,
883® Extra Condenser Lens, to increase the angle of light utilised with a microscope attachment .
(This lens is not absolutely necessary when a micro attachment is used, but considerably increases the illumination.)
8336 Brass Adapter, as No. 8333, but including a lantern, slide stage. This
fitting converts the lantern to an ordinary solid front instrument for slide projection, needing only the addition of a double achromatic lens to render it perfect for this class of work (Fig. 8336).
8337 Double Achromatic Lens for above, in rack front, with collar adapter
£3 3s.; 6 in., £1 12s. 6d. ; 8 in. or 10 in. . ’
These lenses can also be screwed into the fitting on the rack bar of the lantern in place of the lens and prism if required, thus saving the expense of brass fitting No. 8336. The advantage of the latter is that it so perfectly excludes all light, and as for slide work only the open stage is not needed this fitting is preferable.
THE “ DEMONSTRATOR’S ” OPTICAL LANTERN.
(newton’s patent.)
For Lime Light or Electric Arc Lamp.
(NEW PATTERN.)
but Ited^with a S^cbV^ ' " Wf11-kn0wn “DEMONSTRATOR’S” LANTERN out is fitted with a 5-inch double condenser so as to enable larger apparatus to be use and has a free base board, that is, the bar is sunk below the surface of the board
19 “ DEMONSTRATOR’S ’’ OPTICAL LANTERN 5-inch double eon denser, with support for rod, and removable front, without arc lamp . ’ £i5 i5