The British Journal of Photography, Volume 27H. Greenwood, 1880 - Photography |
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Common terms and phrases
actinometer action albumen alcohol alkaline amateur ammonia apparatus appear applied artist asphaltum Autotype bath bottle bromide of silver camera Captain Abney carbon carbon printing chemical chloride chrome alum coating collodion collodion process colour dissolved dry plates effect employed exhibited experiments exposed exposure favour ferrous oxalate film gelatine emulsion gelatine plates gelatino-bromide give glass glycerine grains Herr hypo inches instantaneous iodide iron lantern lens lenses light matter means meeting method minutes mixture negative nitrate of silver nitric acid obtained ordinary ounce oxalic acid paper patent Photographic Society picture platinotype portrait potash potassium precipitate prepared present prints produced proportion pyro pyrogallic acid pyroxyline quantity rapid ruby ruby glass salt sensitised sensitive shutter silver bromide slide soluble solution spectrum studio sufficient surface taken temperature tion tone transparent varnish Warnerke washing wet plate yellow
Popular passages
Page 250 - Thus much of this will make black white, foul fair, Wrong right, base noble, old young, coward valiant. Ha, you gods! why this? what this, you gods? Why, this Will lug your priests and servants from your sides, Pluck stout men's pillows from below their heads...
Page 101 - O, it is excellent To have a giant's strength ; but it is tyrannous To use it like a giant.
Page 77 - It is in this state that I prefer to employ it. 6. Into the iodide thus prepared and modified the plate is dipped for a few seconds. All these operations may be performed by moderate daylight, avoiding, however, the direct solar rays. 7. A solution is made of nitrate of silver, containing about 70 grains to one ounce of water.
Page 66 - K is either absent or very thin as compared with its appearance in the solar spectrum.* In the spectrum of Arcturus, which belongs to the solar type, this line exceeds in breadth and intensity its condition in the solar spectrum. The white stars may, therefore, be arranged in a series in which the line K passes through different stages of thickness, at the same time that the typical lines become narrower and more defined, and other finer lines present themselves in increasing numbers. Arcturus seems...
Page 132 - A vote of thanks to the Chairman brought the meeting to a close. THE NATIONAL EISTEDDFOD AT RHYL.
Page 77 - ... nitrate of silver, containing about 70 grains to one ounce of water. To three parts of this add two of acetic acid. Then, if the prepared plate is rapidly dipped once or twice into this solution, it acquires a very great degree of sensibility, and it Ought then to be placed in the camera without much delay. 8. The plate is withdrawn from the camera, and, in order to bring out the image, it is dipped into a solution of protosulphate of iron, containing one part of the saturated solution diluted...
Page 229 - -We give you notice that if you sell or offer for sale, exhibit or distribute any copy of the subject 'The Huguenot...
Page 66 - ... led finally to the exclusive adoption of this method. The photographs were examined and the lines measured by means of a micrometer attached to a microscope of low power. These measures were reduced to wavelengths by the help of solar and terrestrial spectra, use being made of M. Cornu's map of the ultra-violet part of the spectrum, and of M. Mascart's determination of the wave-lengths of the lines of cadmium. Photographs have been obtained of the stars Sirius, 1 Abstract of paper by W.
Page 251 - Vice-President, in the Chair. THE minutes of the previous meeting having been read and confirmed, the...
Page 175 - It will be found convenient, to avoid mistakes in the imperfect light of the dark-room, to have these two bottles of different shapes. Either of the above solutions will keep two or three days. When required for use, pour into a clean glass measure equal parts of D and A, adding the A last, just before using. Place the dry, exposed plate face up in a shallow dish or tray, and pour the mixture steadily over the plate, avoiding air-bubbles ; should any adhere to the surface of the plate, at once remove...