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Zatent Entelligence. Application for Provisional Protection. 1007. James Henry Habe and Henri James Dale, both of Little Britain, in the city of London, lor an invention of “ Im proved apparatus for supplying sensitive plates in photographic cameras.”—Dated 24th February, 1883. Specifications Published during the week. 3232. J. F. PLUCKER, for “Stand for photographic cameras.” This invention consists in an improved construction of tripod or stand for photographic cameras. This improved stand is very portable, as it is of exceedingly light construction, and is capable of being readily collapsed within a very restricted compass. It is provided with a ball and socket joint, for the adjustment of the camera at any angle or position required. The legs of the stand are telescopic, each being made in three sections (more or less) of brass or other tubing, sliding the one within the other, the lower end of each section (except the innermost one) being provided with a clip formed by slitting the end of the tube lengthwise, making it slightly conical externally, and sur rounding it with a sliding band or collar, whereby the section next below may be tightly gripped, and prevented from sliding. The lowermost section of each leg terminates in a foot, formed of a semi-tubular piece of metal provided with lateral projections inserted in the end of the tubular section, which is collapsed at the extremity or brought to a corresponding semi-tubular form and rivetted or soldered thereto. The legs of the stand are pivoted in a head-piece between ears formed of an assemblage of V-shaped pieces, each of which forms one ear of each of two adjacent pairs, the several pieces being held together below by a plate, and above by a collar embracing lugs formed on them, the collar being a flange on the underside of a segment of a sphere forming the male part of a ball and socket joint, the female part of which is a concave socket corresponding in sphericity to and fitting on the male part. This socket is by a central hook or other attachment connected to a screw passing axially through the male part and the plate beneath, and screwing into a tubular stem situated at the underside centrally between the legs of the stand, the said stem being provided with a thumb-piece pivoted so as not to prevent the folding of the legs close together, and by which the screw may be tightened up in order to bind the ball and socket tightly together and fix the camera after adjustment. The socket is formed with a screw on top, upon which the camera is fixed. What I claim as the invention to be protected is— 1st. A telescopic folding tripod stand for photographic cameras constructed substantially as described. 2nd. The construction of the head-piece and ball and socket joint for supporting and adjusting the camera on a tripod stand substantially as herein shown and described. 3rd. The construction of the clamping joint for uniting the telescopically sliding sections of the legs of a camera tripod or stand, such joint consisting in the combination of the slit and coned end and its tightening band substantially as shown and described. 4th. The construction of the feet of the tubular telescopic legs of a camera stand substantially as shown and described. Patents Granted in France. 150,656. Ricard and Co., for “ Obtaining coloured photographs on stuff.”—Dated 16th August, 1882. Class 17. 150,668. Wall, for “A photographic process.”—Dated 17th August, 1882. Class 17. Patents Granted, in America. 271,765. Viola J. AUGIR, of Spencer, Iowa, for “An album for photographs, &c.—Application filed loth May,1882. No model. 271,789. Joseph Chains, Arthur Durand, and Frederic Sal- lonier de Chaligny, of Lyons, France, for “ A process of and apparatus for colouring photographs.”—Application filed 27th November, 1882. No model. Patented in France, 24th June, 1882, No. 149,778. 271,826. Mathias Flammang, of Newark, N.J., for “A plate holder for photographic cameras.”—Application filed 28th December, 1881. No model. 271,838. F. B. Gould, of Boston, Mass., for “A microscopic photographic transparency.”—Application filed 28th January, 1882. No model. Patent Granted in Austria-Hungary. E. Olive, of Paris, for “ Mourning-frames for photographs.”—• Dated 17th June, 1882. TWELVE ELEMENTARY LESSONS ON SILVER PRINTING. Lesson IV.—Drying, Fuming, and Cutting-up. All paper, when wet, expands, and contracts upon drying. Sensitized paper is not an exception to the rule. Now, if this expansive and contractive property acted equally, no disadvantage would result; but such is not the case. It has been tound that the manner of drying has some in fluence on the result; for that reason, therefore, it is cus tomary for most printers, when they remove the wet sheet from the bath, to clip it by one corner first, then another, and so on until it has depended from each about an equal length of time, and become dry; the sheets will also dry flat in this manner, a matter of no mean importance when the practice of fuming is adopted. So much has been said by some of our best photographic printers both for and against the practice of fuming the paper with ammonia, and, considering that our American cousins adopt it almost exclusively, we will briefly describe the operation. When ammonia hydrate (NH,OH), known as liq. ammon. fort. s.g. -880, is exposed to the atmosphere, pungent fumes of gas are given off. If these fumes are collected in a closed box, and sensitized paper subjected thereto, the sensitiveness will be nearly doubled ; the colour of the print will be inclined to violet, of course depending on the length of time it is acted upon. The toning will also take place in nearly half the time required for un-fumed paper. Finally, the result will be quite equal in every respect to paper not so treated. The reasons why we think fuming is not more generally adopted in this country are—Firstly, because the fuming cupboard or box is a trouble to make; secondly, because the commercial article as obtained from many places is not up to the standard; and thirdly, partly as a result of the two first reasons, because many of those who have tried it have failed. We have seen all sorts of contrivances used ; in one case a cupboard was requisitioned, the sheets were hung up by means of clips some sixty inches from the floor, whilst a basin con taining an indefinite amount of the liquid was placed on the floor, the door shut, and the action continued for a quarter of an hour ; the drawback to this plan was, that the paper was not acted upon equally, hence a mixed batch of prints was the result. We have since seen an arrange ment which has been in constant use for some years, there fore can speak as to its practicability. An ordinary pine box measuring 25 by 20 inches, by 18 inches deep, to which a lid is attached, having a piece of moulding screwed on ; also strips of felt tacked on to the upper edge of the box to prevent the escape of gas when shut; inside, and a couple of inches from the top, a light wooden frame covered with coarse netting is hinged so as to allow of the stock-bottles being taken in and out; a saucer on the bottom to contain the liquid completes this simple but effective arrangement. To prevent failure and disappoint ment attention should be given to one or two essential points. Purchase the ammonia solution in Winchesters, and keep them well stoppered. Four out a measured quantity (say one ounce) into the saucer just before starting the fuming; this quantity will be found sufficient for half-a-quire of paper. Always keep the lid on the box, except when changing paper. Be sure the paper is quite dry before it is placed in the box. Ascertain from each sample the correct time to fume; give it that time, and no more. To those who have never tried fuming we would say : Give the first sheet thirty seconds ; cut off a small piece, and expose to daylight. If the colour be reddish—as it darkens in the light—the time has been insufficient; it will