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- TABLE DES MATIÈRES
- RECHERCHE DANS LE DOCUMENT
- TEXTE OCÉRISÉ
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Developments
formula:
may be made with any of the following
AMIDOL.
Water
Sodium Sulphite, crystals pure Amidol
dot ... ■ ■ • • ■ • ■ ■ 20 grains.
, Bromide of Potassium solution, about 5 drops
Water .. . . . . . . • ■ to ozs.
Metol ............................. 24 grains.
Sodium Sulphite, crystals pure . . h oz. Sodium Carbonate crystallized . . 240 grains.
10% Bromide of Potassium solution, about 20 drops.
METOL-QUINOL.
Water .............................. 10 ozs.
Metol .............................. 7 grains.
Sodium Sulphite, crystals pure . . A oz.
Hydroquinone . . . . .. .. 30 grains.
Sodium Carbonate crystallized . . 600 grains.
10% Bromide of Potassium solution, about 10 drops.
Development is very quick, and directly it is finished the prints should be placed in the fixing bath, which is recommended to be made of water 20 ozs , hypo 5 ozs., with a few drops of acetic acid, or add say 1 oz. common powdered alum. The fixation takes place in from five to ten minutes, and then wash half hour in running water. The glossy- prints may have a higher surface given to them by squeezing to talced glass or to ferrotype plate. Sometimes streaks will appear on the glossy paper, but these may be removed by clearing with weak ferricyanide of platinum and hypo.
One of the neatest things we have seen for a long time is the dark-room contained in a Davenport, devised by-David Allan, 157 Whitfield-street, W. In the usual way-this useful piece of furniture can be employ-ed as an ordinary Davenport writing-desk, a space being provided for the storage of stationery. When a dark-room is needed, however, the photographer has only to say “ Hey 1 presto 1 ” and lift up the top of the desk, and the thing is done. He
"ml find a well-ventilated chamber, containing a lead-lined sjnk, a large pane of ruby glass, with a bracket outside the chamber for a lamp, a cistern of water, and shelves for
The Photogram.
developers and other accessni ies. Beneath is a tank to hold the waste wa-erfrom the sink, and capable of containing three limes the amount of wa.er in the cistern. This
sounds like a fairy story-, but it is quite true and the Davenport dark-room will no doubt prove a boon to many an amateur whose space is limited.
CATALOGUE.
C. P. C-oerz. Optical Works, Berlin-Schoneberg, Germany. The little catalogue of lenses made by this firm contains several useful tables of conjugate foci, reducing tables, etc., in addition to the price list and descriptive matter. Besides this we have received a German catalogue of apparatus made by this firm, very fully illustrated, and giving several examples of the work done by their Anschutz hand-camera and other similar apparatus.
13,642. Kinetoscope. A. F. Parnaland, 42 Boulevard Bonne-Nouvelle, Paris. June 20th, 1896.
13.674. Lens Mount. A. Wrench, 50 Gray's Inn-road, London. June 20th, 1896. Relates to a method of mounting the lens on a camera or magic lantern so that the axis of the lens always remains radial to a centre in the focal plane when the lens is laterally- displaced. The front (i, fig. XLI.)
of the camera lies on the surface of a sphere, whose centre lies in the focal plane. The flange (h) of the lens mount is correspondingly shaped to fit on the surface (i). Two parallel slots (l, l) are made in the flange (It), and through these are passed guiding and clamping screws (k, k). In modifications the flange (h) is clamped between two spherical surfaces.
13,701. Shutter. W. Thompson, The Royal Institution Laboratory' of Manchester: and H. Smith. 33 Withington-road. Whalley Range, Manchester. June 22nd, 1896.
63
Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 96,99 %.
La langue de reconnaissance de l'OCR est l'Anglais.
formula:
may be made with any of the following
AMIDOL.
Water
Sodium Sulphite, crystals pure Amidol
dot ... ■ ■ • • ■ • ■ ■ 20 grains.
, Bromide of Potassium solution, about 5 drops
Water .. . . . . . . • ■ to ozs.
Metol ............................. 24 grains.
Sodium Sulphite, crystals pure . . h oz. Sodium Carbonate crystallized . . 240 grains.
10% Bromide of Potassium solution, about 20 drops.
METOL-QUINOL.
Water .............................. 10 ozs.
Metol .............................. 7 grains.
Sodium Sulphite, crystals pure . . A oz.
Hydroquinone . . . . .. .. 30 grains.
Sodium Carbonate crystallized . . 600 grains.
10% Bromide of Potassium solution, about 10 drops.
Development is very quick, and directly it is finished the prints should be placed in the fixing bath, which is recommended to be made of water 20 ozs , hypo 5 ozs., with a few drops of acetic acid, or add say 1 oz. common powdered alum. The fixation takes place in from five to ten minutes, and then wash half hour in running water. The glossy- prints may have a higher surface given to them by squeezing to talced glass or to ferrotype plate. Sometimes streaks will appear on the glossy paper, but these may be removed by clearing with weak ferricyanide of platinum and hypo.
One of the neatest things we have seen for a long time is the dark-room contained in a Davenport, devised by-David Allan, 157 Whitfield-street, W. In the usual way-this useful piece of furniture can be employ-ed as an ordinary Davenport writing-desk, a space being provided for the storage of stationery. When a dark-room is needed, however, the photographer has only to say “ Hey 1 presto 1 ” and lift up the top of the desk, and the thing is done. He
"ml find a well-ventilated chamber, containing a lead-lined sjnk, a large pane of ruby glass, with a bracket outside the chamber for a lamp, a cistern of water, and shelves for
The Photogram.
developers and other accessni ies. Beneath is a tank to hold the waste wa-erfrom the sink, and capable of containing three limes the amount of wa.er in the cistern. This
sounds like a fairy story-, but it is quite true and the Davenport dark-room will no doubt prove a boon to many an amateur whose space is limited.
CATALOGUE.
C. P. C-oerz. Optical Works, Berlin-Schoneberg, Germany. The little catalogue of lenses made by this firm contains several useful tables of conjugate foci, reducing tables, etc., in addition to the price list and descriptive matter. Besides this we have received a German catalogue of apparatus made by this firm, very fully illustrated, and giving several examples of the work done by their Anschutz hand-camera and other similar apparatus.
13,642. Kinetoscope. A. F. Parnaland, 42 Boulevard Bonne-Nouvelle, Paris. June 20th, 1896.
13.674. Lens Mount. A. Wrench, 50 Gray's Inn-road, London. June 20th, 1896. Relates to a method of mounting the lens on a camera or magic lantern so that the axis of the lens always remains radial to a centre in the focal plane when the lens is laterally- displaced. The front (i, fig. XLI.)
of the camera lies on the surface of a sphere, whose centre lies in the focal plane. The flange (h) of the lens mount is correspondingly shaped to fit on the surface (i). Two parallel slots (l, l) are made in the flange (It), and through these are passed guiding and clamping screws (k, k). In modifications the flange (h) is clamped between two spherical surfaces.
13,701. Shutter. W. Thompson, The Royal Institution Laboratory' of Manchester: and H. Smith. 33 Withington-road. Whalley Range, Manchester. June 22nd, 1896.
63
Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 96,99 %.
La langue de reconnaissance de l'OCR est l'Anglais.