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[SEPTEMBER 14, 1883. Aatent Entelligence. Notice to Proceed. 3727. Alfred George Brookes, of 59, Chancery Lane, in the county of Middlesex, Patent Agent, for an invention of “ Im provements in means or apparatus for use in packing and preserving polishing or abrasive plates or discs in piles or series during transport or otherwise.”—A communication to him from abroad by Luther D. Shephard, of Boston, in the county of Suffolk, in the state of Massachusetts, one of the United States of America, Dentist.—Dated 31st July, 1883. Patents Void through. Non-payment of Duties. 3464. Domenico Coglievina, Civil Engineer, of Vienna, Louisengasse, 19, for an invention of “A centigrade photo meter.”—Dated 2Gth August, 1880. My invention has for its object a more accurate and reliable measurement of light than can be obtained by the ordinary photometers, which compare the light from any source with the light of a standard candle, or similar unit, by means of a movable screen. In my photometer I adopt as unit the length of the extreme beam of a light source, and compare the intensity of two light sources, by letting the light from both sources fall from opposite sides upon a ball, which produces an image upon a mirror placed vertically under the ball (or in any other suitable position). If the ball is lighted equally from both sides its image is simply a circle, but if lighted unequally, the limit between the two opposite hemispheres is visible, and. appears on the mirror as a straight line. 3511. Emile Andreoli, of the Strand, in the city of West minster, for an invention of “ An improved process for orna menting fictile wares, glass, and metallic suifaces."—A com munication to him from abroad by Jean Baptiste Germeuil- Bonnaud, of Paris, in the republic of France.—Dated 30th August, 1880. The object of this invention is to reproduce on articles of china, faience, earthenware, and similar materials, also on glass or metal, in a simple, effective, and economical manner, pictures and devices in colours without the aid of an artist, and the invention consists in the mode of or process for effecting this object. In carrying out this invention photography is em ployed to give the outlines and the shadows, and the effect is enhanced by the addition of colours. Let it be supposed that it is desired to reproduce a portrait in colours upon a china plate. The outlines and details of the portrait are traced on to the plate from a photographic print in any convenient manner, and to this tracing I may apply flat tints corresponding to the natural tints of the parts represented, and also, if desirable, to form a background. The plate with the colour thereon is then fired to fix the colours. The colours used are the usual mineral colours mixed with suitable fluxes, and, by preference, ground up with an essential oil. This part of the colouring and baking process may, however, in some cases, be dispensed with. A plate of glass is next coated with a film of a sensitized substance composed of distilled water 100 grammes, syrup of fecula (C,,H,0,) (grape, sugar) 30 grammes, gum-arabic 15 grammes, pure glycerine, several drops, pure bichromate of potash, 10 to 20 grammes. The sensitized film is then exposed to the action of light in a printing-frame under a negative of the portrait. After sufficient exposure the glass plate is removed from the frame, and the requisite colours to obtain the desired effect are gently laid on the film with a soft camel’s hair brush in the form of powder, the colours to form the shadows being first applied, and then the pervading tints. The next operation is to disengage the coloured film from the glass plate, and this is effected by soaking in water. As, however, the water would disturb the colours on the picture, a protecting coating of “ normal collo dion ” is first applied thereto. The coloured film is then plunged into a bath of a 25 per cent, solution of caustic potash. The effect of this bath is to destroy all organic matters and dissolve the bichromate of potash. At the same time the fluxes mixed with the colours will be dissolved, but the oxides forming the colours remain. The action of the caustic bath is to free colours from their salts of chrome, leaving a photographic image in colours. The next operation after a careful washing is to replace the fluxes washed out during the previous operations, and by the caustic potash bath. This is effected by floating the film with the collodion side downwards on to the top of a regenerating bath prepared as follows, yiz, ;—Dissolve in boiling water borate of soda to saturation ; to 10 litres of this solution add 25 grammes of gelatine and 100 grammes liquid ammonia ; let the mixture stand for about twenty-four hours, and then pass it through a filter. After subjection to the regenerating bath, the film picture is ready to be placed on the plate of semi-baked china with the face upwards. This may ba done by floating it into its place in the manner well known to photographers. After leaving the regenerating bath the photographic picture is, if re quired to be retouched, the full brilliancy of the colours being brought out by the applicatiou of spirits of turpentine. The plate is then fired in the usual manner, the resulting picture having all the appearance of hand-painting. 3396. Frederick Prince, of Patcham, in the county of Sussex, for an invention of “ Improvements in apparatus for displaying or exhibiting photographic pictures or other objects.”—Dated 28th August, 1876. A rotary album, not differing much from the old patterns. Patent on which. Stamp Duty of £50 has been paid, 3,702. William Morgan-Brown, Patent Agent, of 38, South ¬ ampton Buildings, London, for an invention of “ An improved method or process for obtaining coloured photographic prints.” —A communication to him from abroad by Theodor Pixis, of Munich.—Dated 11th September, 1880. Patent Granted in Italy. C. Oros and A. VERGERAVD, of Paris, for “ Paper for photo graphic positives, and its manufacture.”—Dated 6th June, 1883. Patents Granted in United States. 283,952. “ Photographic camera-box.”—E. B. Barker, New York, assignor to E. and H. T. Anthony and Co., same place. —Filed May 17, 1883. The ends of a semi-circular or ai ch-like metal strip are attached to diagonally opposite corners of the camera, and this arch of metal, which extends some little distance outside the camera, is gripped by a kind of vice attached to the base-board of the apparatus. By sliding this arch of metal through the jaws of the vice, the camera can be rapidly adjusted from a verti cal to a horizontal position, or vice-versd, or clamped at any intermediate point. 281,073. “ Photographic exposing apparatus.”—R. SCELOTTEE- noss, Vienna.—Filed January 14th, 1883 (no model). This invention is a somewhat complex shutter with electric- magnetic release. 283,997. “ A stereoscope.”—Charles A. Gartner Jersey City. —Filed April 23, 1883. The inventor claims the application of various adjusting pieces to an ordinary stereoscope. INSTANTANEOUS PHOTOGRAPHY. History and Development of a New Art-Science. BY EDWARD A. ROBINSON. The most conspicuous application of light to the purposes of art is in photography. Nothing in the whole range of applications of the natural forces to the purposes of art can excel the results obtained by photography for exquisite accuracy. For example, a plate of glass is covered with an emulsion of gelatine. The object to be secured is focussed in the camera ; the plate is put into the dark-slide, placed in the camera, and an exposure made. In a few seconds a chemical action has taken place; the parts which have been exposed to light from the object have been affected, while those in the dark remain unaffected, as is proven in the development which follows. If the amount of light admitted to the camera has been suffici ent to cut into the sensitized film on the plate, a good result may be reasonably expected to follow. If, however, there has not been a sufficient quantity of light admitted, the negative will be unsatisfactory. It is a well-known fact that Daguerre’s first experiments were made with a single achromatic objective ; a lens whose limited power of light enabled him to photograph inanimate objects only. Many of us remember the early period of photography, when persons were obliged to. sit in the full sunlight, and allow the dazzling rays to fall directly upon the face, a torture which is clearly marked on the portraits still pre served of these photographic victims, in the blackened shadows, the distorted muscles, and the half-closed eyes. These caricatures could certainly not bear any comparison with a good portrait from the life, nor probably, would portrait