Collodion positives exhibited a similar difference of character. The works of one photographer would be cold and metallic looking, while the works of another would be softer and less metallic, giving a better idea of the texture of flesh and the difference of fabrics, which many attributed to the superiority of the lens; but the difference was really due to manipulation, treatment, and intelligence. And so it is with the collodion negative. A tree, for instance, may be photographed, and its whole character changed by selecting a bad and unsuitable light, or by bad manipulation. The least over-development or "piling up" of a high light may give it a sparkling effect that would change it into the representation of a tree of cast iron, rather than a _growing tree_, covered with damp, soft, and moss-stained bark. Every object and every fabric, natural or manufactured, has its own peculiar form of "high light" or mode of reflecting light, and care must be taken by both artist and photographer not to exceed the amount of light reflected by each particular object, else a _hardness_, foreign to the natural object, will be represented. But not only should the artist and photographer possess this feeling for nature in all her subtle beauties and modes of expressing herself, to prevent a miscarriage in the true rendering of any object, the photographic printer should also have a sympathy for the work in hand, or he will, by over-fixing, or in various other ways, mar the successful labours of the photographer, and make a negative that is full of softness, and tenderly expresses the truth of nature, yield prints that are crude, and convey to the mind a sense of _hardness_ which neither the natural objects nor the negative really possess. Now, I think it will be seen that _hardness_ in a painting or a photograph does not mean sharpness; nor is the artistic meaning of the word _hardness_ confined to "rigid or severe drawing," but that it has a broader and more practical definition than concentration; and that the converse to the art meaning of _hardness_ is softness, tenderness, truthfulness in expressing the varied aspects of nature in all her forms, all of which are coincident with sharpness.--J. Werge (_Photographic News_). UNION OF THE NORTH AND SOUTH LONDON PHOTOGRAPHIC SOCIETIES. _To the Editors, British Journal._ Gentlemen,--Allow me to express my opinion on the suggestion to unite the North and South London Societies, and to point out a few of the advantages which, I think, would accrue from a more extensive amalgamation.