Suche löschen...
The photographic news
- Bandzählung
- 27.1883
- Erscheinungsdatum
- 1883
- 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-id1780948042-188300004
- PURL
- http://digital.slub-dresden.de/id1780948042-18830000
- OAI
- oai:de:slub-dresden:db:id-1780948042-18830000
- Sammlungen
- Fotografie
- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
- Strukturtyp
- Band
- Parlamentsperiode
- -
- Wahlperiode
- -
- Bandzählung
- No. 1292, June 8, 1883
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
- -
- Wahlperiode
- -
-
Zeitschrift
The photographic news
-
Band
Band 27.1883
-
- Titelblatt Titelblatt I
- 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 27.1883
-
- Titel
- The photographic news
- Autor
- Links
- Downloads
- Einzelseite als Bild herunterladen (JPG)
-
Volltext Seite (XML)
THE PHOTOGRAPHIC NEWS. VoL. XXVII. No. 1292.—June 8, 1883. CONTENTS. PAGE Science at the Fisheries Exhibition 353 Camera Vignettes, or Cartes Russes 354 The Alteration of Paper when Exposed to Light 354 The Postal Photographic Society 355 Half-a-Dozen Portraits 355 Mountains in Photography. By M. Burton 257 F reach Correspondence. By Leon Vidal 358 Apparatus for Printing by the Blue Process. By Channing Whitaker 3 358 Notes 360 Patent Intelligence 362 PAGE Twelve Elementary Lessons on Silver Printing 362 A Day in Mid-Cheshire with the Liverpool Amateur Photo ¬ graphic Association. By A. W. Beer ; 364 Extract from the Report of the Astronomer-Royal to the Board of Visitors of the Royal Observatory, Greenwich ecn-• 364 Photo-Lithography and Photo-Zincography. By Major •. Waterhouse, B.S.C 367 Correspondence 365 Proceedings of Societies 36 Talk in the Studio 367 To Correspondents 368 SCIENCE AT THE FISHERIES EXHIBITION. Those interested in microscopical science will find at any rate one remarkable series of exhibits worthy of their attention. Mr. Thomas Bolton, naturalist, of Birmingham, at Stand 756 in the Western Arcade, shows a most valuable collection of living organisms, both marine and fresh-water, in a series of microscopes, which will set many a micro photographer longing to depict. In the first, we see a young salmon just hatched from the egg ; but still carrying its provender in the form of an umbilical sack of yolk on which it thrives for six or seven weeks till it is able to take in sufficient food by its mouth. The three lobes of the heart are distinctly seen in rhythmical contraction, pump ing the brilliant red blood characteristic of the salmonidse through the various intricacies of the capillaries from the arteries into the veins, which in the microscope are mapped out like a complete system of river draught. In another microscope we see a cluster of perch spawn ; in the field of view are seen four or five eggs, each of which has its coating or shell pierced by immumerable pin-like orifices, by which it is presumed the contained ova breathes, or is aerated by a gradual interchange of water. Inside each Q' ra is seen the minute fish semi-developed with its large eyes, and under the neck careful examination will reveal the expansion and contraction of the lobes of the heart • but as in this class of fish the blood is quite colour less, its movements are not so clearly seen as that in salmon, and to see the circulation of the blood requires most careful illumination. It is curious to see the occasional wriggling of the young fish inside the egg in its struggle to get free to commence independent life. In one of Mr, Bolton’s aquaria, he points out some young salmon infested with parasites (arguhts Jacaceus), a little shield-shaped animal allied to the crabs and lobsters. One of these parasites has been taken off the young salmon and placed under a microscope, which reveals in this pretty little culogmostracan some of the wonderful adaptations of nature. The argulus is perfectly trans parent, like a piece of animated glass. On each side of its head is a many-faceated eye, and below each eye are elaborated suckers by which it attaches itself to the fish ; but in addition, it is armed with a variety of yellowish horny hooks on its legs. No wonder that the fish have much trouble to rub such unwelcome visitors from their backs. Between the two eyes is seen in active movement a protrusive mouth, out of which, every now and then, it darts a beautifully pointed lancet used by this formidable blood-sucker to pierce the skin of the fish. The internal anatomy of the argulus is laid out in the microscope like a diagram before you, and you see its blood coursing in streams through its limbs and gills. After we had taken a few minutes’ look at these wonders Mr. Bolton re-adjusted the microscope toa higher power, and now around the head of this parasite we see attached, by minute pedicles, numerous bell animalcules (vorticella), all in active life. One individual, with its pedicle stretched out quite straight, has a bell-shaped body surrounded at the edge of the bell with a wreath of little hairs or cilia all lash ing the water in good rythmical style, producing a regular vortex or whirlpool amongst the floating microscopical atoms in the water, drawing in a good supply of food to its mouth. Suddenly, however, like a flash of lightning, it is with drawn, and the vorticella is changed from a bell-shape to a spherical form, and its previously straight pedicle is now coiled up like a spiral spring, which may be watched gradually unwinding, and allowing the animal to stretch out again after its food, till again withdrawn on the approach of danger, or possibly of unpalatable food. Care ful examination reveals quite a cloud of these (shall we say?) parasitical animals attached to this parasite of the fish. They are not, however,true parasites, but are only attached, and make use of the argulus to carry them to their food, and are spoken of by naturalists as commensals. In another microscope are shown the always popular Volvox Globator, which has, in its time, been bandied about from the animal to the vegetable kingdom, until its real nature was known. It is now set down as one of the confervoid alga. In the microscope it may be observed rolling through the water in prett y much the same manner that a balloon makes its way across the sky on a still day. Only a low optical power is required to cover all the objects that we saw in the Volvox, one of the prettiest objects it is possible to imagine. It is a globe of the most delicate green colour, formed of a transparent membrane, which is marked with a net-work of fine lines ornamented with darker green spots, just where the lines cross. What is more singular is the manner in which the Volvox reproduce themselves. W ithin each globe may be seen smaller globes fashioned precisely like the parent. Even within these enclosed young, not unfrequently, you may perceive a third generation in embryo. Another instructive exhibit is the circulation of the sap in a plant (Nitella translucus) ; the green granules are seen streaming along in the cell of the plant like a river. Canoclutus Volvox is also shown. It is one of the most charming of the very interesting group of Rotifer or Wheel animalcules. The clusters are distinctly visible to the naked eye, swimming slowly along, ascending or descend ing, by the motion of the powerful cilia that surround the head. Each cluster consists of many individuals united by the extremity of the foot, and radiating from a common centre in every direction. Amongst Mr. Bolton’s exhibits of window aquaria in the same collection (intended for keeping a reserve of microscopical organisms), is one containing that interesting
- Aktuelle Seite (TXT)
- METS Datei (XML)
- IIIF Manifest (JSON)