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AN APPARATUS FOR COLOURED CINEMATOGRAPHY FOR THE PURPOSES OF MEDICAL INSTRUCTION.
(from the German)
There is no doubt that teaching is most efficacious when assisted by ocular demonstration, when the student is able actually to watch the thing he is studying.
As a rule, however, this is unfortunately not possible, either because circumstances do not allow the pupils to be present all together, or because many practical experiments are not fully demonstrable. This applies especially to the field of medicine, for instance to surgery, gynecology, etc., which demand many i llustrations of such phenomena as operations, childbirth, and so on.
Such demonstrations may be satisfactorily replaced by moving pictures which, much enlarged, are made accessible to the spectator, adding the force of vision to the spoken word. Such moving pictures may be carried out either in black and white or in colors, by means of mosaic plates, which latter are preferable as the former reproduce only imperfectly the shading of red objects, the color most frequent in operations, making them appear almost black.
In spite of this, projections in black and white are much more frequently employed than colored projections, because they can be reproduced any number of times, can be printed on paper, and are less costly.
But both these methods have the great disadvantage of immobility, as a result of which it is only possible to reproduce single phases of a vital process.
(Ed. Note) We have pleasure in publishing herewith Prof. Tietze's article, and shall always be happy to open our pages to any papers dealing with new systems and processes and accounts of all that is being achieved in the domains of technical knowledge and science for the improvement of the cinematograph and so as to render it available for the purposes of teaching and general culture.
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