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The photographic news
- Bandzählung
- 7.1863
- Erscheinungsdatum
- 1863
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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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- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
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- Bandzählung
- No. 226, January 2, 1863
- Digitalisat
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Zeitschrift
The photographic news
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Band 7.1863
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- Register Index 619
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Band 7.1863
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4 results obtained by this method sewage water, and a sample drawn from a pump in the neighbourhood of a cesspool have been tested by this method; the latter was found to contain no less than five grains of organic matter- (oxidisable) in the gallon. Photographers would do well to practise this simple kind of test occasionally, for oxidisable organic im purity is especially injurious in their operations. Somewhat allied to the subject of purification of water is the formation in a ready and cheap manner of binoxide of hydrogen, which has just been accomplished by Mr. Duprey. By passing a very rapid current of pure carbonic acid into distilled water, and adding at intervals binoxide of barium, perfectly pure oxygenated water is obtained. When the quantity of carbonate of baryta is sufficiently large to obstruct the passage of the gas, the clear liquid containing all the oxy-water must be decanted, and the current of car bonic acid again passed into it. As soon as more binoxide of barium is thrown in, a fresh quantity of oxygenated water is formed. In this way we obtain water strongly charged with perfectly neutral and pure oxygenated water, which can be concentrated under an air pump. Care must be taken to maintain a sufficiently rapid current of carbonic acid so as always to be in excess of the small and gradually added binoxide of barium, which must, moreover, be finely powdered, as large pieces escape decomposition. The carbonic acid must be washed care fully by passing through flasks containing carbonate of lime. The best re-agent for oxy-water is decidedly perman ganate of potash which, poured into water containing even a very small portion of oxygenated water, disengages all its oxygen. This body serves, therefore, to estimate oxygenated water as well as organic matter, the phenomena of decolora- ion being very apparent. Three samples of glass have been sent for examination in the spectroscope. No. 1 (S) is of a brown colour, and admits of the passage of several active rays. It is, therefore, inap plicable for photographic purposes. No. 2 (F. Lane) is of an orange colour, and, in the instrument, appears almnst perfect. Some few actinic rays, however, struggle through. No. 3 (Mr. Wilkinson) is similar in colour to No. 2, but a trifle darker. As a photographic screen, it is excellent, the whole of the active rays being cut off by it. • SPIRIT PHOTGORAPHS. Considerable interest is at present excited in certain circles in America by the alleged production of photographic por traits of disembodied spirits! We alluded to the subject in a recent paragraph, as a canard. We now find a good deal of matter on the subject, collected from various sources, in the Spritual Magazine; and as photographers generally will be concerned in preventing their art being made the vehicle of imposture, we give some copious extracts. It is scarcely necessary for us to say that the presence of additional ghostly images on the plate, besides that of the real sitter, is easily compassed. The evidence fixing the identity of such phantom images, and as to the mode of producing them, we leave without comment to the good sense of our readers. The facts, as narrated by Dr. H. F. Gardner, of Boston, are as follows:— “ Mr. W. H. Mumler, an amateur photographer and practical chemist of Boston, was engaged on Sunday, October 6th, at the photograph gallery of Mrs. Stuart, at No. 258, Washington Street, in adjusting the chemicals, which had become dis arranged. Having prepared a plate, and placed a chair near the focus of the camera, by which to adjust it, he proceeded to take his own photograph, card size, by quickly jumping into position and standing still the required time. The picture—a copy of which we have seen—represents Mr. Mumler as an active, rather athletic-looking man, standing with his coat off, and the black cloth, used to cover the camera, in his hand. Upon the back of this card appears the following statement:— ‘ This photograph was taken of myself, by myself, on Sunday, when there was not a living soul in the room beside me—‘ so to speak.’ The form on my right I recognise as my cousin, who passed away about twelve years since.—W. H. Mumler.” “ The form referred to is that of a young girl apparently sitting in the chair, which appeared on developing the picture, greatly to the surprise of the artist.. The outline of the upper portion of the body is clearly defined, though dim ami shadowy. The chair is distinctly seen through the body and arms, also the table upon which one arm rests. Below the waist, the form (which is apparently clothed in a dress witli low neck and short sleeves) fades away into a dim mist, which simply' clouds the lower part of the picture. Mr. Mumler affirms that this form bears a likeness to a spirit cousin, and its appearance was equally unexpected and startling to the artist, who was not a believer in spiritualism, though perhaps somewhat in terested, and had no reason to suppose himself a medium. “ Since this accidental discovery, we are assured by Dr. Gard ner that at least a dozen similar photographs have been taken, a new spirit form appearing at the side of each subject. The artist experiences a loss of strength in the process that limits him to three or four sittings per day. The forms are not as distinct as we could desire, yet they are sufficiently marked to prove individuality to friends. Dr. Gardner kindly left with us two specimens of photographs taken subsequently to the one we have described. They are card photographs of a gentleman and his wife, residents, we believe, of Chicopee. On the picture of the lady stands beside her a female form, re cognised by both parents as the likeness of a spirit daughter. The upper portion of the form is quite distinct, but the lower fades out in the form of flowing skirts, partly covering the mother’s dress, till quite indistinct at the floor. The other has a less distinct form, yet one recognised by the gentleman as that of his mother in the summer land. A peculiarity about this picture—less distinct though it is—renders it one of the most interesting we saw. The upper portion of the shadowy figure alone has a recognizable form, and this is so large, that were the figure to be completed in due proportion, the feet would be carried some distance below the floor. It is a magni fied image of a human (or spirit) head, hardly possible to have been produced from any visible object within range of the in strument. And the arm of the spirit seems thrown about the neck of the subject (her son), the hand resting like a little cloud of mist upon tire opposite shoulder. Witnesses were present, in all cases except the first, to testify that only one person sat for each picture, and yet we are assured that in some instances three additional forms appear. Similar results to those mentioned above can perhaps be produced by' any skilful photographer, by introducing forms during a portion of the time a plate is exposed, or reflecting an image upon the sensitive surface in the dark room. Wo trust scientific and truth-loving photographers will experiment, that, if possible, the fraud or accident, if either exist, may be exposed, or the means made use of by spirits to project an image upon the air exposed to the line of vision of the camera be discovered.” We next hear that Mr. William Guay, a practical photo grapher, had undertaken to test and verify this matter. He thus writes on the subject to the Banner of Light, a Boston paper:— “'Boston, Nov. 18, 1862. ‘“Mr. Editor,—Having been informed by Mr. William H. Mumler that you desire to publish the results of my investiga tion into the possibility and genuineness of Mr. M.’s photo graphic impressions of spirit forms, it gives me much pleasure to detail to you what I have seen. As I have been commis sioned by Messrs. A. J. Davis and Co., you can rest assured that I was resolved, if permitted, to allow nothing to slip my utmost scrutiny. Having had ten years’ continual practice in this particular branch—that is, negative on glass, and positive on paper from negative—I felt competent to detect any form of deception. “ ‘ Having been permitted by Mr. Mumler every facility to investigate, I went through the whole of the operation of select ing, cleaning, preparing, coating, silvering, and putting into the shield, the glass upon which Mr. M. proposed that a spirit form and mine should be imparted, nver taking off my eyes, and not allowing Mr. M. to touch the glass until it had gone though the whole of the operation. The result was, that there came upon the glass a picture of myself and, to my utter as tonishment—having previously examined and scrutinized every crack and corner, plate-holder, camera, box, tube, the inside of the bath, &c.—another portrait.
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