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820 THE PHOTOGRAPHIC HEWS. [December 24, 1885. proved that when Sachs’* gelatine plates were immersed in a solution 1:2000 of chrysaniline, the only effect pro- j duced was that the action was moved farther towards the yellow than with undyed plates ; this about cot responded with Eder’s description. It is different, however, when using the pure bromide of ! silver plates of Monckhoven. These gave a second maxi mum of sensitiveness at b E, which gradually fell off on both sides, quite analogous to the fading absorption band, which can be observed by the eye. And as with most dye stuffs, a shifting of the absorption band takes place. Chrysaniline, therefore, forms no exception to the prin ciple of optical sensitizing, but, on the other hand, affords confirmation of it. As a sensitizer, chrysaniline acts in its own peculiar way. If two plates are exposed, and one of them is im mersed before development in nitrate of chrysaniline 1:2000, and the two developed in ferrous oxalate, the develop ment is found to be much accelerated by the chrysaniline. If the two plates are taken at the same time out of the ferrous oxalate, it appears as though the plate treated j with chrysaniline had received at least double the expo sure of the other. This is, however, a mistake, for if the second plate is left longer in the developer, it catches up the first, and shows just as much detail. The first plate, however, with chrysaniline, shows less powerful contrasts, and the details in the lights are better preserved ; and consequently chrysaniline, as a preliminary bath, acts like one of hypo 1:5000 in giving softer picture. I must add that this substance (chrysaniline) has many advantages over hypo used as a preliminary bath. It works not only more rapidly, but has less tendency to the formation of fog. THE NEW WINTER HEALTH RESORT. BY " JEAN VILLE.” I wonder how many readers of the News have ever heard of Wiesen. An article in the News of October 2nd, on “ Clouds,” gave me the idea of offering a few specimens of my work here. Though we have not the low horizon line recommended by Mr. Wyles, and which no doubt would be a necessity in England for first-class work of cloud subjects, yet a variety of cloud effects unattainable, I think, WIESEX. in a district without mountains, can often be observed in this neighbourhood, and others resembling it. This lovely little place has not, as yet, been done justice to by the photographer. Of the stream of tourists, flowing con tinually during the summer months to and from the Engadine, very few turn off at Alvenen-Bad, after crossing the Albula Pass, and visit Wiesen. And yet, the reward of doing so would be ample, for they would find lofty • Sachs’ gelatine plates contain about two per cent, of iodide of silver. mountains, deep and [savage gorges, picturesque old bridges, and, in fact, material enough to supply the photo grapher with work for many days. A small colony of English people is established this year at Wiesen for the winter, owing to the marvellous effect of the air on those suffering from lung diseases, nervous complaints, and many other disorders. At a height of 4,700 feet above the sea, and perched high up on the hill side, the situation is magnificent, and the long belts of clouds which sometimes i fill the valley below, leaving the mountains clear and the