. The book of photography; practical, theoretical and applied. The principle of the Ives Kromskop isillustrated by Fig. 576, which is a sectionthrough the apparatus. The pictures are Fig. 570.—llED Negative. corresponding transparencies. Compari-son of these, one with another, will en-able the principle to be readily example, if a red glass were placedbehind the red transparency, Fig. 573, itis clear that the only part which willsuffer the red light to come through isthe transparent portion of the shield,which, it will be remembered, is red inthe original. Similarly, when a greengl
. The book of photography; practical, theoretical and applied. The principle of the Ives Kromskop isillustrated by Fig. 576, which is a sectionthrough the apparatus. The pictures are Fig. 570.—llED Negative. corresponding transparencies. Compari-son of these, one with another, will en-able the principle to be readily example, if a red glass were placedbehind the red transparency, Fig. 573, itis clear that the only part which willsuffer the red light to come through isthe transparent portion of the shield,which, it will be remembered, is red inthe original. Similarly, when a greenglass is used for viewing the green trans-parency. Fig. 574, only the ground will be:seen, the shield being represented by an. Fig. 572.—Blue-Violet Negative. viewed through the lens at A. The redglass and transparency are placed at b,the green at c, and the blue-violet at of coloured glass, e e, arearranged so that they reflect the red andblue transparencies, but allow the greenone to be seen through them. Anotherplain reflector is placed at F, to throw PHOTOGKAPHV IN COLOURS. 427 light conveniently through the greentransparency, and the angle of the in-strument is provided for by a hinged strutfixed to the baseboard. The manner inwhich the light falls through the differentparts of the apparatus is shown by the The Kromaz. As a result of patents by Barnard andGowenlock, an instrument known as theKromaz has been lately introduced. Whilefounded in principle on the Kromskop,
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