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ao2 NEWTON & CO., Ltd., Lantern Slide Publishers. - _ ' POLARIZED LIGHT. . „ ^^ ;V^-'Thesa Slides are taken by means of three-colour photography, direct from - the object ?j:‘< -.uimex Polarized Light. The brilliant colours shown in the originals are as nearly as possible ^ reproduced in the Slides. They are very transparent, and can be shown in conjunction •j: Vwith other slides. i£f.~r’.‘A They were taken by the late T. E. Freshwater. F.R.P.S. The Slides should be SjS* ’jVery useful to the lecturer who wants to produce the effect of polarized light without the trouble of working the Polariscope. v Price 10s. Bd. each. BLOCKS OF CHILLED OR UNANNEALED GLASS OF VARIOUS SHAPES. Showing: the permanent polarizing structure of glass that has been uniformly heated and suddenly cooled. .1 Star on dark field. 3 Star on light field. I Two ban ot gtau crossed. 4 Cuba, showing red spots with blue eye*, fi Oral, crota and colour rings. 4 CVc'e, cross and colour rings. QUARTZ PLATES. 7 Triangle. This shows very curious markings., B Rose. Very pretty object. B Square, fire., fa. All the above show the black cross and colour 10 Natural right-hand Compound, very fine, showing the formation of the Crystal. U B4-quartz, right and left-hand, built up. 19 Quartz, showing cross crystallization, whole sec- tion of crystal. SELENITES. IS Bar of crystal, very pretty. 14 Bi-quartz put together at 46 degrees. 15 Plate showing formation ol a twin crystal. IS Wedge showing .bands of colour. 17 Double wedge crossed. IB Concave, worked to show Newton’s Rings, on dark field. 19 Concave, worked to show Newton’s Rings, on light field, showing the comple- mentary colour to the one on dark field. 30 Plate of uneven film. 31 Plate showing made. 33 Amethyst, section of, in plane polarized light. 33 Amethyst with red and green selenite super- 34 Granite. Various rock sections In course ol preparation A Q Z LANTERN SLIDES BY DIRECT COLOUR PHOTOGRAPHY. ' These are made to illustrate three-colour photography by various processes. Price 10s. to 12s. Bd. each. 1 Early momlng in spring. 2 Autumn, Richmond Park. 9 Pines, Chobham, Surrey. 5 Collection of British Fungi. 6 River Inver, Scotland. 7 Lane in autumn. 8 Sunset. (Mackerel sky.) 9 Sunset (River Thames at Kew Bridge.) 10 Chrysanthemums. 11 Tulips. 13 Silver birches. (Burnham Beeches.) 19- Daffodil*. (Kew Gardens.) * 14 Rhododendrons. (Kew Gardens.) 16 Apple tree in bloom. 17 Apple Blossom 19 Cherries on branch. 20 Strawberries on leaf. 21 Fuchsia. 22 Daffodils. 23 A Rose. 24 Bowl of Roses. .4 23 Bunch of Roses. 26 Rambler Rose. (Dorothy Perkins.) 27 Butterflies. Red Admiral. 28 „ Painted Lady, Peacock, Clouded Yellow. 29 „ Kal i m a India, and wings with loaf to show Insect Mimicry. _ 30 Death's Head Moth. ‘ 31 Mason Bee, Life History of. 32 Whalebone. Transverse Section, polarised light. -BYS NATURAL COLOUR PHOTOGRAPHY. Price 10 s. Bd. each Slide. Messrs. Newion have pleasure in announcing the publication of a new series of Natural Colour Slides. A full list ol the subjects will be sent on application. A special selection of 50 Slides will be sent on-loan at a hiring fee of £1 Is. Od. XS PHOTOCHROMOSCOPE SLIDES. ■ Slides, photographed for use with the Photochromoscope, showing, the principles of three-colour photography. »• • .:5; 1 Sets of Three Picture* tn wood frame , 10*. 6d. the eet. '' « r. *•' Messrs. Newton are prepared to make Negatives and Slides by the various colour processes, such as the Autochrome, Paget, Sanger Shepherd, Agfa. Duplex, dkc.