Newton Lantern Slide Catalogue (1920)

8, Fleet Street, Temple Bar, London, E.C. 59 APPARATUS FOR USE WITH THE PROJECTION MICROSCOPE. Objectives. — For low-power work the series of objectives on page 57 will be found very suitable ; of these lenses the official report in the Royal Microscopical Society’s Journal says: “It was specially remarked that even with the higher powers the images were shown with perfect sharpness of definition. _ ' For convenience we reprint the list of these objectives, with the addition of the higherpower lenses suitable for use with these powerful microscopes. 8390 Objective for large objects . . £1 1 0 8395 4-10ths achromatic objective £1 10 0 8391 3-in. achromatic objective . . 2 0 0 8396 l-5th . . . . . . ..220 8392 2-in. „ „ ..2 2 0 8397 l-7th . 220 8393 lj-in. ,, „ ..2 5 0 8398 l-12th immersion (oil), in 8393Al-in. „ „ ..2 5 0 tended for use with powerful 8394 8-10ths achromatic objective 2 7 6 electric arc lamps only . . 5 5 0 Sllb-Stage Condensers. — These are absolutely necessary in the lantern microscope, according to the powers used. 8399 No. 1, sub-stage condenser in cell for low power, and 3-in. objectives . . 0 8 6 8400 No. 2, sub-stage condenser in cpll, for powers from 2 in. to 4-10ths . . 0 8 6 8401 No. 3, sub-stage condenser in cell, for |-in. and J-in. objectives . . . . 0 17 6 8402 No. 4, sub-stage achromatic condenserin cell, for j-in. to J-in. dryobjectives 17 6 8403 No. 5, same as No. 4, with extra front for immersion, objectives . . . . 1 12 6 8404 No. 6, sub-stage double achromatic condenser, with Iris diaphragm and 3 extra fronts for immersion objectives of various angles (intended only for the microscopes on pages 61 and 62) . . . . . . . . . . ■ . 3 10 0 Amplifiers. — These are special concave lenses fitted to work in connection with the microscope objective, and possessing the unique advantage of increasing the mag¬ nification without reducing the field. 8405 Amplifier No. 0 in cell ..£0 9 01 8307 Amplifier No. 2 in cell ..£090 8406 „ No. 1 „ ..0 9 0 1 8408 „ No. 3 „ .. 0 9 0 8409 Amplifier Jacket to take any of the above lenses . 026 Projection Eye-pieces. — These are also intended to increase the magnification, but at the expense of diminishing the field. Where very fine resolution is required, however, they are to be preferred to working either with the objective alone or in connection with an amplifier. 8412 Achromatic Eye-pieces with large field specially corrected for screen work. Nos. 1, 2, and 3 magnifying 1J, 3, and 5 diameters respec¬ tively . 1 . each 17 6 8413 Body Tube for use with eye-pieces, long or short . . . . . . . . 0 15 0 8414 Extra Carriers for Objectives (useful for rapid change of powers) .. 0 3 6 8415 Double Nose-piece, for rapidly changing powers . 0 10 6 8416 Ditto, Triple . 0 18 6 . 8417 Small Square-ended Analyser, for use with eye-pieces for polariscope work . •• •• •• •• •• •• 250 . 8418 Spot Lens for' use with 4-10ths objective, in cell, for showing foraminifera or other objects on a dark ground . . . . . . . . . ■ • • 0 17 6 8419 Lieberkuhn for opaque objects .. .. . ' •• 110 8420 Live Cage, large size, specially made with flush foundation plate for exhibiting live insects, animalcules in water, &c. . . . . . . . . 0 12 0 8421 Glass Troughs for pond life, (fee . Is. 6d. to 0 3 6 8422 Frog Plate for showing circulation of blood in living frog, special pattern for use with Lantern Microscope . . . . . . . . . . 0 17 6 8423 Glass Tank, with platinum eleotrodes, for eleotrolytic crystallisation . . . . . . 0 15 0 Microscopic objects for use with projection microscopes. A large number of botanical, pathological, and entomological No. 8423. Slides, specially selected for projection, always in stock.