The daily morning journal and courier., 1896-01-31

'
 was the most distinct feature in the picture. The whole effect was that of badly defined skeleton hand with a ring on one finger.
 No camera had been used, because, as Professor Schuster explained, the new light-or radiation. as the Profes- sor preferred to call it-differed from ordinary light in some of its most es- sential features. So far as is yet known 1t can neither be reflected nor refracted; the lens has no power to concentrate it and form an image in the usual way, 1 All the photographs taken with it are in the nature of shadows, formed by in- terposing various substances in the path of the rays.
 Another photograph showed a mar iner,s compass or similar dial which had been photographed while inclosed in metal case. The dial was about | two inches in diameter and well de- fined. In another experiment. the source of light had been placed at one side of wooden door, while the plate had been exposed on the other side, and in the resulting picture the internal mark l ings of the wood were revealed, as we'll as the outline of metal hasp or fas- tener,
 1 A photograph of piece of zine, com posed of several strips of zinc rolled into one apparently homogeneous mass, | revealed distinct striation.s in the in | terior of the metal. One of the most 1 instructive of the photographs was pro- duced by passing the radiations through | thin slabs of various materials, such as glass, Iceland spar, iron, and alum l inium. The relative amount of obstruc- tion offered to the rays was made mani fest by the varying depths of tint in | the photograph, and Professor Schus- | to vary i'm the same relation as the density.
 l The heavy substitutes, such as iron, | lead, glass, Iceland spar, offered more ! obstruction than did lighter substances, such as wood, paper, aluminium, or flesh, and this holds good. quite ire spective of the behavior of these sub- l stances with ordinary light As thin layers of wood are comparatively trans l parent to the new enlanations, it will | be seen that photograph can be | taken on a plate inclosed in dark slide without drawing the shutter of the slide"
 1 And now Yale university wins honor in connection with this important mat
 ter. Professor A. w. Wright, who oc- | cupies the chair of experimental phys ics at Yale university, and is in charge of the Sloan Physical Laboratory, has been for upwards of twenty years more or less occupied with the investigation of the phenomena of electrical dis charges in vacuum tubes and has made many experiments beth in the construc- ton of thosegtubes and in studying the
 electrical effects within them. His at
 tention was attracted by the reports of the recent work of Professor w. C.. Rontgen. Professor Wright has now confirmed completely the results of Rontgera's experiments, startling as those results at first appeared. Pro- lessor Wright's experiments were made
 with great variety of substances, and 1 it was found that strong impressions
 were obtained upon photographic
 plate even when it was enclosed in an opaque wrapping of black paper and covered with pine board half an inch thick. Among the metals aluminium is
 especially distinguished, and in one of the experiments of Professor Wright an | the plate so clearly as to show both | the design and lettering. In this lat l ter case the layer between the medal
 and the sensitive plate was absolutely opaque ebonite, which is the substance
 used by photographers to darken com
 pletely the plate-holder,
 Other experiments by Professor Wright just completed were equally 1 interesting and successful and he now
 can show various striking results de-
 linea ting a very large variety of sub-
 stances taken through the ebonite of a photographers case.
 Professor Wright, as the result of his experiments in photographing thus through opaque bodies, sees no obstacle
 to the wonderful precasts of Professor
 Rontgen and even more amazing ul- terior results.
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