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The photographic news
- Bandzählung
- 27.1883
- Erscheinungsdatum
- 1883
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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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- SLUB Dresden
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Zeitschrift
The photographic news
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Band
Band 27.1883
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- Titelblatt Titelblatt I
- Register Index III
- Ausgabe No. 1270, January 5, 1883 1
- Ausgabe No. 1271, January 12, 1883 17
- Ausgabe No. 1272, January 19, 1883 33
- Ausgabe No. 1273, January 26, 1883 49
- Ausgabe No. 1274, February 2, 1883 65
- Ausgabe No. 1275, February 9, 1883 81
- Ausgabe No. 1276, February 16, 1883 97
- Ausgabe No. 1277, February 23, 1883 113
- Ausgabe No. 1278, March 2, 1883 129
- Ausgabe No. 1279, March 9, 1883 145
- Ausgabe No. 1280, March 16, 1883 161
- Ausgabe No. 1281, March 22, 1883 177
- Ausgabe No. 1282, March 30, 1883 193
- Ausgabe No. 1283, April 6, 1883 209
- Ausgabe No. 1284, April 13, 1883 225
- Ausgabe No. 1285, April 20, 1883 241
- Ausgabe No. 1286, April 27, 1883 257
- Ausgabe No. 1287, May 4, 1883 273
- Ausgabe No. 1288, May 11, 1883 289
- Ausgabe No. 1289, May 18, 1883 305
- Ausgabe No. 1290, May 25, 1883 321
- Ausgabe No. 1291, June 1, 1883 337
- Ausgabe No. 1292, June 8, 1883 353
- Ausgabe No. 1293, June 15, 1883 369
- Ausgabe No. 1294, June 22, 1883 385
- Ausgabe No. 1295, June 29, 1883 401
- Ausgabe No. 1296, July 6, 1883 417
- Ausgabe No. 1297, July 13, 1883 433
- Ausgabe No. 1298, July 20, 1883 449
- Ausgabe No. 1299, July 27, 1883 465
- Ausgabe No. 1300, August 3, 1883 481
- Ausgabe No. 1301, August 10, 1883 497
- Ausgabe No. 1302, August 17, 1883 513
- Ausgabe No. 1303, August 24, 1883 529
- Ausgabe No. 1304, August 31, 1883 545
- Ausgabe No. 1305, September 7, 1883 561
- Ausgabe No. 1306, September 14, 1883 577
- Ausgabe No. 1307, September 21, 1883 593
- Ausgabe No. 1308, September 28, 1883 609
- Ausgabe No. 1309, October 5, 1883 625
- Ausgabe No. 1310, October 12, 1883 641
- Ausgabe No. 1311, October 19, 1883 657
- Ausgabe No. 1312, October 26, 1883 673
- Ausgabe No. 1313, November 2, 1883 689
- Ausgabe No. 1314, November 9, 1883 705
- Ausgabe No. 1315, November 16, 1883 721
- Ausgabe No. 1316, November 23, 1883 737
- Ausgabe No. 1317, November 30, 1883 753
- Ausgabe No. 1318, December 7, 1883 769
- Ausgabe No. 1319, December 14, 1883 785
- Ausgabe No. 1320, December 21, 1883 801
- Ausgabe No. 1321, December 28, 1883 817
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Band
Band 27.1883
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THE PHOTOGRAPHIC NEWS. 153 arranged that Mr. W olcott should supply the camera (as he had some knowledge of the matter), and that Mr. John son should procure the materials recommended by Daguerre. In the afternoon of that day, an impromptu camera was rigged up by one operator, and the other proceeded to polish a copper plate coated with silver. The first attempt was a failure, as the plate was polished so effectually that nearly all the silver was removed. The only substitute at hand was a burnisher, and a few strips were at once polished. Two plates were iodised, exposed, mercurialized, and treated with common salt, and greatly were the experimenters puzzled, for though impressions were obtained of the same subject, they were unlike each other. No explanation could be furnished on referring to Daguerre’s directions, and it was not until some time after wards that Messrs. Johnson and Wolcott discovered the difference between a negative and a positive, which they had, in fact, obtained. Their endeavours to find out the reason of the differ ence occupied “the remainder of the day,” and finally another attempt was agreed upon. “ Having duly arranged the camera,” says Mr. Johnson “ 1 sat for five minutes, and the result was a profile miniature on a plate notquite three-eighths of an inchsquare. Thus, with much deliberation and study, passed the first day in Daguerreo type.” It could have been wished that Mr. Johnson had been a little more explicit in stating whether the portrait was secured on the same day as that on which the experi ments were commenced. His words, “ the remainder of the day,” would assume that it was not. On the other hand, he has himself italicised the word “first,” and this, as it stands, implies the contrary However, be this as it may, Johnson’s experiments must have been undertaken at the same time as those of Professor Morse, and there could not have been many days between the production of the por traits, whichever may have been first. Writing on this matter in 1851, the editor of the Darjuerrian Journal remarks : “ This specimen is a profile view of a gentleman, and if not the first likeness from life, is said to claim age with the oldest Daguerreotype ever produced.” The editor farther observes: “The plate is cemented by means of Canada balsam to a piece of plate glass about three-fourths of an inch square, and thus it has been preserved in its present state.” It would be interesting if it could be ascertained whether this portrait is now in existence. The estimation of chlorine in bodies of organic origin is not always easy, as it does not then react in the usual way with silver nitrate. Messrs. Plimpton and Graves find that in the case of volatile organic bodies it is merely necessary to diffuse them through ordinary coal gas, and then to burn the gas. The products of combustion being now absorbed by caustic soda, the chlorine is obtained in a fit condition to be precipitated by silver nitrate. The Edison incandescent light is the sole illuminant now employed in the Eastman Dry Plate Works, Rochester, New York. The use of the incandescent light, protected of course, by suitable non-actinic coverings, render it practicable to keep up the turn-out of plates all the year round. Among the charming examples of Asser’s starch method of photo-lithography which accompanied the letter we print on another page from that gentleman, is a magnifi cent print of Bartolozzi's Infant Bacchus, produced in two tints. Major Waterhouse, the Assistant Surveyor-General of India, writes : “ I find that my method of intensifying wet collodion with ferrous oxalate works almost better with Carey Lea’s solution of bichromate of potash and hydro chloric acid, given on page 651 of last year’s News, than it does with the bromide of copper solution, and in this way it will come much cheaper.” " The observation is not a new one to me. I had the honour to mention it here on the 10th of May, 1812.” Thus spoke M. Chevreul at one of the last meetings of the Academy of Sciences. It is not reserved to many distinguished men to be one of the “ elect ” of science, like this famous French chemist, during a period of seventy- one years. The French Photographic Society is, we believe, the only photographic body that regularly indulges in an annual banquet; to-morrow, the members meet at the Cafe Riche, under the presidence of M. Peligot, of the Institute. One of these days we may find the British societies following the excellent example of their Paris brethren. We hear that Professor Rowland has been employing his concave grating to some purpose in photographing the violet region of the spectrum. Between the lines II and K, where usually but 90 lines are to be counted, Mr. Row land has succeeded in photographing no less than 190! He cannot do this with a gelatine plate, however, but has to employ a dry collodion film, upon which much finer measurements can be made. It behoves one to be careful not to draw conclusions too rashly from photographic results—or other experimental results, for that matter—where many phenomena and changes have contributed to the end ; but making some crude experi ments lately after the manner of Dr. Huggins, we attained a very interesting result. Dr. Huggins, our readers well know, has succeeded in photographing the corona of the sun by the interception of certain rays, and it was our interest in this research that led to the experiment. Three plates were rapidly exposed to the sun, the first in the ordinary way, the second aud third behind green glass. An oxalate developer half the normal strength was used, and the first plate, as might be expected, gave a black solar disc, with a dark fringe or halo round it half as broad as the diameter of the sun. This halo was of uniform depth t hroughout—that is to say, not perceptibly lighter on the
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