Suche löschen...
The photographic news
- Bandzählung
- 29.1885
- Erscheinungsdatum
- 1885
- Sprache
- Englisch
- Signatur
- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- SLUB Dresden
- Lizenz-/Rechtehinweis
- Public Domain Mark 1.0
- URN
- urn:nbn:de:bsz:14-db-id1780948042-188500006
- PURL
- http://digital.slub-dresden.de/id1780948042-18850000
- OAI-Identifier
- oai:de:slub-dresden:db:id-1780948042-18850000
- Sammlungen
- Fotografie
- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
- Bemerkung
- Seite I-II fehlen in der Vorlage. Paginierfehler: Seite 160 als Seite 144 gezählt.
- Strukturtyp
- Band
- Parlamentsperiode
- -
- Wahlperiode
- -
- Bandzählung
- No. 1416, October 23, 1885
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
- -
- Wahlperiode
- -
-
Zeitschrift
The photographic news
-
Band
Band 29.1885
-
- Register Index III
- Ausgabe Ausgabe 1
- Ausgabe Ausgabe 17
- Ausgabe Ausgabe 33
- Ausgabe Ausgabe 49
- Ausgabe Ausgabe 65
- Ausgabe Ausgabe 81
- Ausgabe Ausgabe 97
- Ausgabe Ausgabe 113
- Ausgabe Ausgabe 129
- Ausgabe Ausgabe 145
- Ausgabe Ausgabe 161
- Ausgabe Ausgabe 177
- Ausgabe Ausgabe 193
- Ausgabe Ausgabe 209
- Ausgabe Ausgabe 225
- Ausgabe Ausgabe 241
- Ausgabe Ausgabe 257
- Ausgabe Ausgabe 273
- Ausgabe Ausgabe 289
- Ausgabe Ausgabe 305
- Ausgabe Ausgabe 321
- Ausgabe Ausgabe 337
- Ausgabe Ausgabe 353
- Ausgabe Ausgabe 369
- Ausgabe Ausgabe 385
- Ausgabe Ausgabe 401
- Ausgabe Ausgabe 417
- Ausgabe Ausgabe 433
- Ausgabe Ausgabe 449
- Ausgabe Ausgabe 465
- Ausgabe Ausgabe 481
- Ausgabe Ausgabe 497
- Ausgabe Ausgabe 513
- Ausgabe Ausgabe 529
- Ausgabe Ausgabe 545
- Ausgabe Ausgabe 561
- Ausgabe Ausgabe 577
- Ausgabe Ausgabe 593
- Ausgabe Ausgabe 609
- Ausgabe Ausgabe 625
- Ausgabe Ausgabe 641
- Ausgabe Ausgabe 657
- Ausgabe Ausgabe 673
- Ausgabe Ausgabe 689
- Ausgabe Ausgabe 705
- Ausgabe Ausgabe 721
- Ausgabe Ausgabe 737
- Ausgabe Ausgabe 753
- Ausgabe Ausgabe 769
- Ausgabe Ausgabe 785
- Ausgabe Ausgabe 801
- Ausgabe Ausgabe 817
-
Band
Band 29.1885
-
- Titel
- The photographic news
- Autor
- Links
- Downloads
- Einzelseite als Bild herunterladen (JPG)
-
Volltext Seite (XML)
October 23, 1885.J THE PHOTOGRAPHIC NEWS. 685 best, and labelled “ The perfect castor oil, free from unpleasant taste and flavour.” The former I did not try, and it was almost void of the latter. The formula sent with the films for oiling differs from that given in the circular sent out by the Company. My first experiment was by that received with the films, which proved a failure on my part ; the iron used was either too hot or too cold. No matter how I tried, the grain was still left in the paper. The following night saw me at the mode recom mended in the circular, heating the oil to near boiling point, and pouring it over the negative, then wiping off the surplus oil with a soft bit of cloth. After a time the grain of the paper dis appeared. Now, I have a word of caution for those who have a desire to invest in films that require castor oiling. I would advise them to try the experiment of oiling a few pieces of paper, and, if successful, and do not find it very disagreeable, good and well. For my part, I found it most disagreeable. Since writing the preceding, I observe the use of vaseline recommended, and by a method which I will here describe. After the negative is removed from the washing water, and squeegeed on to the glass and allowed to dry, rub over it some vaseline, and put it over a tray with boiling water set over a Fletcher burner, which will have the effect of melting the vaseline and penetrating the paper. For removing the oil or other medium from the film side of the negative, it requires to be wiped with a little cotton wool and alcohol. Regarding film-carriers, I took the trouble to have half-a-dozen weighed against half-a-dozen average glass plates, and found that the carriers weighed as near as may be half the weight of the glass. The great advantage of films will be.during a tour, and no small factor in the matter. You can, always be sure of having an even-coated surface. As for roller-slides, they have their advantages and disadvantages, so far as I have seen of them, and I would not advise any one to dispense with their present double backs, but rather invest in film-carriers, which are inexpensive. —o MY DEVELOPER BOTTLE. Something not very Novel, but Good ! BY H. SCHOONMAKER. To protect pyro solution, use a layer of oil (I use good head light) about an inch thick. Same for ferrous-sulphate or ferrous- oxalate solution. The potassic oxalate solution has a disagree able habit of crawling up the inside of the bottle and around the neck. A thin layer of oil is a sufficient preventive of this. The pyro solution seems to exert a slight action on a fresh laye of oil, which causes some discolouration of the pyro solution, but this ceases after a short time, so I think it best to keep the sime oil on top when fresh developer is made up, as the action will be less than if fresh oil is used. I have pyro solution on baud which has been made up for about six weeks. It changed in a few days to a sherry-wine colour, but has got no deeper in colour for several weeks, and is perfectly free from any muddi- ness or granular deposit. This, I think, is a good test. I at tribute most of the discolouration to fresh oil, but perhaps it was impure sulphide or pyro. It cannot be caused by contact with oxygen. The method of operation is plain. Simply blow in the tube A, and the pressure on the liquid will force it out of tube B as desired. Don’t tip up the bottle towards the lower end of B, or it will be apt to act as a syphon. For the same reason the bent portion of B should not have the end lower than the level of the liquid in the bottle. If this bottle, in its simple form, is not elaborate enough to suit, just attach a piece of rubber tub ing to A with a rubber bulb (such as are fitted to the ordinary atomizers) at the end, and squeeze this in the hand. This will enable you to allow the bottle to stand on a shelf, which may be a gain when using large bottles. I have ascertained that this developer bottle is not a new thing at all. No use to publish it unless to emphasize its great utility for the purpose. 1 find it ne plus ultra for any solution much used—developer mixed, pyro, potassic oxalate, ferrous sulphate, soda or ammonia, hypo, mercuric chloride for intensifica tion, &c.—Philadelphia Photographer. PHOTOMICROGRAPHY FOR WINTER EVENINGS. BY MR. GOODWIN.* During the dark days, now fast coming upon us, ,when outdoor work is perforce suspended, we are all liable to be seized with the desire to photograph something, and there is no more interesting outlet for this desire than microphotography, as it used to be called, or photomicrography, as it is now termed. This may be defined as the art of making enlarged pictures of minute objects. There seems to be a very general impression that it is an extremely difficult and expensive branch of photo graphy, but it is only so in certain cases, and many hundreds of most interesting photographs may be made with very simple apparatus. Expense and difficulty only become great when ex tremely delicate work has to be done. If we turn, however, to preparations showing the structure of plants, insects, or the smaller animals, we shall find that very simple optical arrange ments will be sufficient. I propose to show you how such objects may be considerably enlarged by artificial light with apparatus mostly home-made, and, moreover, made in the course of an evening. As a matter of course, anyone who has, or can have, the occa sional use of a complete microscope cannot do better than use it. Such an instrument as I have here is very suitable ; it has a very short tube, with an interior draw-tube, and this is an ad vantage, as the usual long tube contracts the field of view con siderably. To use it the " objective ” or lens is screwed on and the eye-piece removed ; the slide bearing the object is placed on the stage in the usual way, and the microscope turned down horizontally. A beam of light is sent through the object and lens, and the enlarged image received on the ground glass of an ordinary camera. It is not, however, necessary to have a com plete microscope, the only essential pait being the lens. lam going to use to-night a lens of 1} inches equivalent focus, and for the class of work I have mentioned it is quite powerful enough. The only other optical appliance needed is a condenser or “ bull’s eye lens,” mounted on a stand. Turning to the rest of the apparatus, there is first an ordinary camera from which the rising front has been removed, and in its place a piece of wood is fitted on to which is screwed one end of an empty cigar box, and through both of these is cut a hole about two inches in diameter. In the other end of the box is bored a hole into which the objective fits tightly. Below the box is fitted a sliding board, which carries at its outer end a stage to support the object, and a focussing arrangement, consisting of piece of wood travelling on three little brass rods, and moved by a fine screw, against which it is held by two rubber bands. To use this apparatus the sliding-board is moved outwards or inwards till the object is roughly focussed, and the adjustment completed by means of the fine screw. The size of the object is regulated by the distance of the ground glass from the lens, and is adjusted by the ordinary focussing-rack of the camera. Should great magnification be required, another cigar-box may be added, or a double convex lens may be used as amplifier. The detail in these minute objects cannot be well seen on ground glass, so I have removed it, and substituted a piece of glass • Abstract of a communication to the Glasgow and West of Scotland Amateur Photographic Association,
- Aktuelle Seite (TXT)
- METS Datei (XML)
- IIIF Manifest (JSON)