The San Francisco call., 1898-04-03

to certain point In the picture, Is con- verted into an electric current by the employment of an electric battery with a selenium cell The property of selenium cell is that it's electrical re- sistance varies with the color of the light to which it is exposed; it is ener- gized in different degrees by different rays A blue ray, say, will have very powerful effect upon it, while red ray will set up very weak cur rent.
 This electric battery Is connected by wires with an electro-magnet at the re- ceiving end, where the electric currents are to be reconverted into rays of light. The electro magnet will accomplish this by moving in sympathy with the elec- tric current sent out from the transmit ting apparatus, and its movements will necessarily correspond to the nature of the ray reflected. A blue ray, for in- stance would move 1t considerable distance, while red ray would only slightly defect it.
 Now this magnet is made to move prism, which is placed in front of strong white light-either the light of the sun or an electric light. The action of the prism will break the white light up into its seven prismatic colors. These coors are spread out in a spectrum. The prism being moved by the electro magnet, it will necessarily revolve just so far as to bring the required color into view.
 This color will now be reflected In one of the two oscillating mirrors at the receiving end. And just as the action of the other two mirrors was analytic so the action of these two is. Each point of the picture Is reflected on a screen, and as the points follow one another in very rapid succession in- deed, the eye of the observer will take in the impression of the entire picture as if it's points were all presented to it simultaneously.
 The picture can be made to last as long as may be desired by constantly reproducing the effect, and at such a speed that the observer is unconscious of any break in the process. It Is no more difficult to reproduce a moving picture than a still one, for the inven- tor explains that "it is the actual pie ture which is reproduced, and not a mere record as in the case of the kine- matograph."
 Another point claimed is that there is practically no limit of the distance within which the apparatus can be used. With the possibility of a tele- phone wire 1000 miles long, such as that between Chicago and New York, the inventor thinks that the telectroscope wires might be of any length.
 rrnIa up a wide field of possibilities. Scenes of foreign travel, battle fields during action, and the eclipse of the sun are only few of the things we might have seen recently, while sitting comfortably at home, had Herr Szczepanik had his machine we'll established little earlier. AS 1t is, the question arises, has not this Galician genius done away with the necessity of visitors actually going to Paris in 1900?
 Like most other inventions that are for the reproduction of any kind of vi- bration the telelectroscope seems to have one or two weaknesses. A number of scientific men who were given private view of its workings. while surprised and pleased even beyond their widest ex- pectations, stated to the editor of Lon- don paper that the invention seems to have been inspired by the kinemato- graph. and it is said that the images resemble to the kinematographic i'm ages, and are shivering like these. " Again, Thence follows that the image does not appear in the natural colors but in the corresponding spectral col ors, and the colors in which the image appears are not quite clear"
 But such slight objection at such an early hour after the invention can surely be overcome in a short time, possibly before the opening of the Paris exhibition.
 After the Paris exhibition 1t is the in- tention of the promoters of the telelc- troscope to exploit 1t in all the big cities of the world
 Of course San Francisco will be in- cluded, and when that time comes you can step into the place when the ap- paratus is on exhibition and see what your friends are doing in some of the