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The photographic news
- Bandzählung
- 6.1862
- Erscheinungsdatum
- 1862
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- Englisch
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- Hochschule für Grafik und Buchkunst Leipzig
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- Hochschule für Grafik und Buchkunst Leipzig
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- Bandzählung
- No. 189, April 17, 1862
- Digitalisat
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Zeitschrift
The photographic news
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Band 6.1862
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- Register Index 619
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Band 6.1862
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7, 1862. Avnr 17, 1862.] THE PHOTOGRAPHIC NEWS. 191 the combination is carbide of hydrogen, discovered some by v d the p” n made! apliersW/ n ? ot lie thoug I oubtlet if the kiv t desirab otograpb temperatures, but, at first, without obtaining the desired result. Finally, the extremely simple and happy idea occurred to him of making a current of hydrogen pass between the two carbon points of the electric light excited by Bunsen’s battery of GO elements, and then his efforts uere crowned with success. At this extreme temperature the hydrogen combines with the carbon, and the product of | evidences of official blundering, that these profound and talented gentlemen have yet been guilty of, and in saying this, I make a bold assertion. In the appointment of Captain Fowke, who may however be an excellent engineer officer, but whose design for the Exhibition building, has caused him to become celebrated as the most original architectural bungler of the day; instead of obtaining a gentleman whose abilities would, at least, have been of such an order, that he would have been competent to have erected a temple of industry and art, which might bear a favourable comparison with an arcade market or a railway station, which it is an acknowledged fact that “ the house that Fowke built,” cither ih point of symmetry, elegance, or architectural beauty does not. In classing art photographs with patent grubbers, liquid manure distributors, and other products of mechanical dexterity, as though a picture which embraces in itself the highest efforts of scientific skill and artistic ability, was produced by a process similar to grinding “Dixey’s land” upon one of those anacreonitic abominations yclept a barrel organ, they displayed a deep seated, and no doubt laboriously acquired, ignorance of art and architecture, which might scarcely be anticipated from a New Zealander. Such being the ease it ought not to be surprising that they indulge us with a taste of their leading propensity, when they invite tenders for the privilege of operating in the building, by constructing a code of rules for intending “ tenderers ” which, I think, will have the effect of deterring any but those who may have friends at court from making an offer for the monopoly. In the first place, they do not bind themselves to accept the highest, or, in fact, any tender. Now this appears to me to be a very “ tender ” subject. Though a gentleman may stand at the summit of his profession, his taste and skill beyond question, and his offer considerably in advance of other competitors, his tendermay be but so much waste paper, unless he posess a friend amongst the Commis sioners. This is unjust to the profession, and makes tendering a mockery and a delusion. Now the fairest system would be to have tender completely open, taking care, however, that only operators of proven ability be allowed to manipulate. Again, in the event of any dispute, the Commissioners form the only tribunal of judgment, and from whom there is no appeal. Now as the unlucky photographer will, in all human probability, have more rows with the Com missioners than any other individuals, I scarcely think that the court could be considered an equitable one, when the judges are parties to the action and, will allow of no appeal from their fiats. They rouse a never slumbering suspicion in my breast, of either their total ignorance of the theory and practice of the art of photography, or else their prejudice against it, and their desire to injure it in the eyes of the public, by decreeing that no operating will be allowed after 10 a.m., or if I read the rule right, before that hour, unless upon conditions that are not detailed ; and, as a culminating point to a tissue of eccentricities, which would be laughable, were they not unfair to the public, and unjust to the profession, they will not allow any space within the building for either sensitizing or developing, nor yet will they allow those two indispensable formulas of the wet collo dion process to be carried on in the building. This rule, if carried out, will totally prevent the application of what is universally allowed to be the best and safest system now known to science, and will compel the artist to use dry plates against his judgment and experience, besides entailing on him double labour, and poorer results. Now Mr. Editor, I would call upon the profession to protest to a man, against what all must look upon as cither an evidence of the densest stupidity, or a strong desire to lower photography in the eyes of the public, to minister to the vanity of a clique of painters who arrogate to them selves alone, the privilege of being called legitimate artists I would also advise the non sending of tenders, till the specifications are modified. I am yours, &c., Thomas D. Bell. ■il, 1862. ceeded 11 .combs ’ zular co’ he phot* • in yol possess, re cond atacom2 to gratil vignet ually nts ge0 iction 0 h app®” colour, I , and a itlyth’ d t0 J ardboat, ■ep blac rom th” ken. an. . betwet 11 evelope. ichlorid, proper! ; ass, mol < ; years ago by M. Berthelot, to which he gave the name of acetilene. He has been able to collect sufficient of the pro duct to submit it to numerous experiments, and discover that it possesses all the properties of acetylene derived from organic sources. M. Berthclot has previously succeeded in —firstly, forming by means of mineral compounds, and by a purely chemical method, the principal carbides of hydro gen; secondly, in transforming these carbides into alcoholic compounds; but this was neither a carbide nor an alcohol resulting from the direct combination of two mineral prin ciples—from carbon and hydrogen. This, however, is only aphilosophiad production of alcohol, not yet available for manufacturing purposes; though, as a scientific fact, it is both curious and important. M. FROMENr has invented a new chronograph, which pro- mises very remarkable results. The apparatus measures sounds, the duration of which is only one five hundreth part of a second; it consists, mainly, 1st, of drum about 40 inches 1,1 circumference, silvered on its surface, which is covered with lamp-black at the beginning of an experiment, and to which clockwork imparts a motion of three turns in a Second, 2nd, Of a diapason giving 500 vibrations per second, Perfectly controlled, by comparison during several whole days with a regulator, which is both electrical and astrono- mical. 3rd, Of a fixed point in the diapason, which traces a sinuous curve upon the cylinder covered with lamp-black. 4th, Of a little electrical apparatus, intended to mark, by a point proceeding from the spark of induction, the beginning and the end of each phenomenon. What distinguishes this chronograph from all others which have preceded it, is the very great length by which a phe nomenon of infinitely short duration is represented on the blackened cylinder, and the facility with which this length may be subdivided by a microscope. It is stated that in re cent experiments the time occupied by a ball in passing through a space of some inches, after being projected from a rille, was accurately measured. PHOTOGRAPHIC CONTRACT IN THE INTER NATIONAL EXHIBITION. “ Semper s/ultus." Dear Sin, I he extraordinary document which has emanated from the Commissioners of the Great Exhibition, inviting" enders for the solo privilege of operating in the u " ing , is to my mind, one of tlic the most glaring place on the glass may be fixed with the nicest accuracy, so that no difficulty in placing the head in the centre of the oval, need be experienced. JI. de La Blanchere has published a treatise on the stereo scope. It contains a history of the discovery, and various improvements in this magical little instrument, an excellent summary of the various theories of binocular vision ; and a de scription of the materials necessary in the production of stereo scopic pictures, themethods by which negatives and positives, both on glass and on paper, are obtained or working with dry collodion, and an account of the various apparatus to which the stereoscope has been applied. Although little more than a compilation, the book will be found to possess a certain usefulness to those who are interested in this branch of the photographic art. II. Berthelot has succeeded in a most interesting chemical experiment, resulting in nothing less than the direct combi- nation of hydrogen and carbon. Having for a long time been convinced that by placing hydrogen in contact with carbon, at an extremely elevated temperature, they would combine with each other, he tried the experiment at all ind that re no test 1 ore were! er from } cperience dr. Davis’ purposes, re very f s ago, bet’ . taken w hich wob er. ie results? 'st mode ig the pt de of pot* id printi the cop* y would] xt meeti bers tod ry plates bout to' ject wo® 1 had opP ho Exp
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