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The photographic news
- Bandzählung
- 6.1862
- Erscheinungsdatum
- 1862
- Sprache
- Englisch
- Signatur
- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- SLUB Dresden
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- Public Domain Mark 1.0
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- urn:nbn:de:bsz:14-db-id1780948042-186200003
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- http://digital.slub-dresden.de/id1780948042-18620000
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- oai:de:slub-dresden:db:id-1780948042-18620000
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- Seite 1-72 fehlen in der Vorlage. Vorlagebedingter Textverlust.
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- Parlamentsperiode
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- Wahlperiode
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- Bandzählung
- No. 202, Juny 18, 1862
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
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- Wahlperiode
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Zeitschrift
The photographic news
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Band 6.1862
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- Ausgabe Ausgabe 73
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- Register Index 619
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Band
Band 6.1862
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- Titel
- The photographic news
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July 18, 1862.] THE PHOTOGRAPHIC NEWS. 341 1 pro- um is rsome water, r com- potash ray be otash; or by ill the comes irated; iltered 1 right yellow :il heat fly by ine B- is per heated ses the rganic n with ut tiro | lightly I ion the ; of this rtinga is inso- I .queens ure; to ization id, and iryta is romate ilver is ited to icible ; o crys; c, and of this ed into on. ngular whet ■ belo" italligg ac id oxy®. jp»riW ■iite'.! in W 1 ' colot" s capb: vale" 1 ' sstil . whet 1 to pa licacil e,ho f sola ah V* hic la in the e puri ons of tate 0 likely Lof the Jicbj of the water. The name distilled is generally considered sufficient guarantee of the purity of water, and its fitness for photo graphic purposes; this, however, is by no means the case: distilled water, unless prepared especially for chemical pur poses, usually consists of the condensed vapour from steam machinery, and then almost always contains greasy matter and other impurities. It is of the utmost importance that such water is never employed for photographic purposes, and hence a test which will at once detect the presence of this injurious impurity in distilled water cannot be too highly valued; such a test is afforded by the salt in question. The salt is prepared by mixing eight parts of peroxide of manganese, seven parts of chlorate of potash, and ten parts of hydrate of potash, dissolved in a very small quantity of water; the mass is evaporated to dryness, during which a small quantity of mineral chamelion is formed : the finely- Powdered mass is ignited in a platinum crucible over a spirit lamp, till the whole of the chlorate of potash is decomposed (1 low red heat is quite sufficient for this) ; the semi-fused mass is then reduced to coarse powder, and boiled in a larger quantity of water; the insoluble portion is allowed to sub- •de, and the clear solution decanted off and evaporated lapidly; it is again decanted from the freshly precipitated Peroxide of manganese, and the solution is allowed to crys- lllize by cooling. The crystals are then washed in a small quantity of cold water, dissolved in the smallest possible quan- tity of boiling water, and the solution left to crystallize by tooling. In this way the salt is obtained in large needle- shape crystals, amounting in weight to about a third of the Weight of the peroxide of manganese employed. If it be desired to filter the solution, in order to avoid the loss arising from decantation, a funnel may be used, having a stopper of asbestos, or gun-cotton, loosely stuffed into its neck. The salt forms dark purple needles, belonging to the right pris- matic system. They have at first a sweet, and afterwards a fough taste, and are permanent in the air: they are neutral test paper. When heated, the crystals decrepitate, evolve oxygen, and are converted into a black powder, from which vater extracts manganate of potash. The crystals dissolve in sixteen parts of water at the ordinary temperature. All Organic substances exert a deoxydizing action on the solution; alcohol acting with peculiar rapidity, whilst gum, sugar, Paper, &c., act more slowly. When the liquid is exposed to the air in open vessels, organic particles falling into it, it is also decolourised in a short time, carbonic acid from the Amosphere combining with the potash. Chemical solutions Wlich have been filtered through paper, and indeed most "pecimens of distilled and ordinary water, contain sufficient rganic matter to decompose permanganate of potash, taking the excess of oxygen and precipitating permanganate °f potash. the inundations in the fens from a PHOTOGRAPHIC POINT OF VIEW. weeks ago, our ordinary photographic routine was by the receipt of a hastily written letter from an enthusiastic photographic friend of ours, it ran as nearly as "e can remember as follows :— “Dear B— We are on the eve of a calamity, the like of lich this district has not seen for 300 years. The middle tYa sluice has burst, and in consequence of the rush of 1 a water into the drain it is full from bank to bank. How ongit will stand the strain we know not, but it is only a astion of a few hours, for it might break at the weakest Pont,and then we shall have Marshland fen underwater. °uld advise you to pack up your photographic apparatus "gone at once.” lettdhespicture presented to our eyes by the contents of the hue r did not tempt us to obey our friend’s request. We first"the sluice well, and though it was considered, when Neer; U1 some sixteen years ago, quite a triumph of engi- mas Skill, still, in its ruined condition, it would be but a 5 o tumbled brick-work, offering but few materials for SoirE few disturbed an artistic picture; and as for the middle level drain it presented no salient point of attack, for a river some seven miles long, and straight as an arrow, even when full from bank to bank, though offering a capital subject for the study of perspective, was no tempting object for the photo grapher in search of the picturesque; but when, in the next day’s paper, we saw that the banks had broken, and each succeeding day’s intelligence increased the magnitude of the catastrophe, and that the worst fears had been realized, and Marshland fen was once more in its primitive condition—a vast sheet of brackish water—when we found that the daily papers had sent down special reporters to. the scene, and that a column was given daily to the description of events, we must confess we felt a feverish desire to witness the scene with our own eyes, or rather with the eye of our camera. We accordingly packed up and started for the Fens. We must admit some fond remembrances of boyish days tended considerably to increase the desire to see this well- remembered spot under its new and unexpected aspect, for many a time in years gone past, when we had occasion to ride frequently by train across this country, now submerged, we have looked out upon the vast unvaried scene in the dim twilight, and have quite realized the idea that we were looking out upon an immense inland sea, such a one as Tennyson describes when he writes:— " whence we see, Stretched wide and wild, the waste, enormous marsh, Where from the frequent bridge, Like emblems of infinity, The trenched waters run from sky to sky.” And we felt desirous to see how like the “ counterfeit pre sentment ” was unto the real scene now to be witnessed. We felt, also, that though such an immensity of flatness, with but few incidents to break the monotony, beyond an occasional cottage or homestead under water, presented, under ordinary aspects, but few temptations to a photo grapher, it might, under the magic influence of the setting sun, give all that could be desired; for how few materials are needed to make a picture. A slimy shore, with water beyond, and a broken boat in the foreground, lit up by the golden glories of sunrise or sunset, and we have a scene that the genius of a Turner but imperfectly depicts after years of labour. The morning was a magnificent one when we started, and we left town buoyant with hope for successful results; but as we drew nearer to the end of our journey, the day put on a garb of leaden hue, and long before we reached our destination, the rain came down in such a manner as to clearly indicate there would be no photography done that day. We soon found, by the conversation in the carriage, that we were not alone in our desire to witness the catastrophe, for several were upon the same errand. When we got to Watlington, some people entered the carriage, who had just returned from an inspection of the scene. They informed us that they came all the way from Norwich to see the inundation, and they had walked some three or four miles from the station down the disused Wisbeach line until the water barred their further progress, and that though the journey had been performed in the rain, they felt that the strange sight fully repaid them for all toil and discomfort they had endured. All this only served to whet our desires the more, but we had no alternative but to go on to Lynn, and wait patiently for the morrow. The next day got up dull and heavy, as though still suffering from the effects of the copious libations so recently indulged in. We determined, however, to take an early survey, and select points for future operations; and now came a difficulty we had not anticipated. Lynn was full of visitors, and as everybody wanted to see all they could, and as there was no direct railway communication, all the old fashioned means of locomotion were in requisition, and not a piece of horseflesh, or anything in the shape of a trap was to be had, except at fabulous prices. However, thanks to the efforts of an old acquaintance well up in these matters, we succeeded in getting something of the dog-cart kind, which
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