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156 THE PHOTOGRAPHIC NEWS. [March 27, 1868. meut in the daily press, headed “ Dr. Loewe’s Toilet is made,” followed by the statement that in May will appear the “ First Proof of One Year of an Inventor’s Existence in London, which will be a page fiom the Book of England, written, illustrated, composed, photographed, stereotyped, printed, and edited, by Dr. J. M. Loewe, Inventor of a Printing Process destined to make a Revolution in the Printing World.” CARBON Reproductions.—Mr. J. F. Boyes, of “ The Auto type Printing and Publishing Company,” writing to the Athenceum on the subject of Braun’s carbon prints, now exhi biting, says:— 1 • M. Braun is entitled to the highest credit for the artistic taste with which he has selected the subjects, and the care with which he has reproduced them ; but the whole credit of the invention of the process is due to our fellow-countryman, Mr. J. Wilson Swan, of Newcastle, who has sold the right of working his patent in France and Belgium to M. Braun. Mr. Swan’s determination to render the process in all respects perfect has been the reason why it has not been better known in this country. Having achieved this result, it may interest your readers to be informed that public attention will shortly be called to the matter, this company having just acquired Mr. Swan’s patent for the process.” Caution to Opticians and Photographic Dealers.— We are informed that orders for lenses have been sent to more than one photographic optician, dated from Noble Street, Wood Street, stating that the goods are required for exportation, and promising cash on delivery. In one case an order was supplied, but no cash was forthcoming. In another case an invoice was delivered, with an intimation that the goods were ready on payment of the cash, but no further application for the goods followed after this condition was stated. Our commercial friends will do well to be on their guard. PHOTOGRAPHING Children.—A correspondent sends us a somewhat curious advertisement copied from a Canadian paper. The advertiser is a photographer, and informs the public that “ the pictures taken at this establishment are cele brated all over the world, and every where else.”! He announces “ photographs taken in all kinds of weather,” adding, however, “ Bring small children on bright days only, but leave their fathers and mothers at home.” Uo Correspondents, A Reader of the News.—The accidental mixture of sulphate of soda with your hyposulphite does not render the latter unfit for use, as no injurious effect will be exercised upon the prints. You must take care, however, in making a fixing bath, to estimate the amount of sulphate of soda present in weighing out the hypo sulphite. J. F. Butler.—The clearing process to which you refer as prac tised by Mr. Osborne was not for the purpose of reducing the intensity of negatives, but rather a step in a process of increasing intensity. Its object was to remove any trace of deposit on the transparent parts of a negative after development with iron, pre vious to further intensifying, in order to secure very dense, clean negatives, giving perfectly black-and-white prints in reproductions of prints, plans, &c. His method consists in the application to the fixed negative of an extremely dilute solution of iodine and iodide of potassium, until any foggy deposit on the transparent parts becomes converted into iodide of silver; this is then easily dissolved off by a solution of hypo or dilute cyanide. You will find • the process stated on p. 485 of our Sixth Volume, or on p. 42 of our Year-Book for 1864. Educator.—In reproducing woodcuts you require to secure a per fectly clean and bright negative at the outset, free from any deposit on the shadows, either from over-exposure or fog. Any trace of such a deposit will acquire colour when treated with bichloride and a sulphide or iodide, and materially interfere with the contrasts required in the picture. You will find the gelatino-iron developer will aid you in securing bare glass in the shadows. Use, also, old collodian and an acid bath. See, also, answer above, as to a method of clearing negatives of the kind in question. One of the best modes of securing perfect opacity is as follows :—After fixing and washing and removal, if necessary, of any foggy deposit on the shadows, treat with a 5-grain solution of iodide of potassium until the film is of a uniform grey; wash, and apply a 1-grain solution of iodide of potassium until a yellowish-green tint is obtained; then wash, apply pyrogallic acid and silver in the usual manner. Almost any degree of density can be so secured. A. P.—Many patents have been taken out for colouring photographs at the back, and then rendering them transparent. We do not think that any of them are now in force. ?hotographs Registered. Mr. S. Thompson, York, ns. Photograph of Monument to the Officers of Enniskillen Vra Mr. SKED, Bristol, Two Photographs of Mr. W. T. Turpin. One Photograph of Bishop of Kilmore. Mr. R. SLINGSBY, Lincoln, Photograph, from Drawing, of a Fancy Ball. H. S.—The streaks on the print sent have much the appearance of being due to the glass rather than the bath. Have you satisfied yourself on this head ? The negative is a little over-exposed, and the development pushed too far. Try adding a little nitric acid to the bath; expose more fully, and let us know the result. J. C. S.—The lens you mention is not suitable for the production of interiors ; all single lenses will give you curved marginal lines. The exaggeration of the foreground is not due to any construction of lens, but to the use of lenses of too short focus; the defect is therefore incident to all wide-angle pictures. The magnesium lamp may be successfully used for illuminating objects for photo graphing ; but it is not suitable, wo fear, for interiors of churches, as the accumulation of the smoke is an objection. F. W. H.—Thanks for the interesting examples of your mode of utilizing photography, which appears very valuable for the purpose W. B.—We are not personally familiar with any one whom wo can recommend. Mr. D. Rees, of 3b, Broadway, Ludgate Hill, adver tises lessons on moderate terms, and we have seen some of his work in tinting cards, which is good. W. J. A. G.—The Photographic News is published in the Office on Friday morning at 9 o’clock. It goes to press on Thursday evening, and all copies required for post are posted during the night. We are glad to learn that you now get your copies in satisfactory time ; the paper was under other business management when you received it late. We have been able during the last few months to make many business improvements. Enquirer.—M. Petit Jean’s method of silvering glass is as follows : Prepare two solutions, the first containing 3 drachms of nitrate of silver and 1 drachm of strong liquid ammonia in an ounce of water; after filtration add 16 ounces of distilled water; then add, a drop at a time, half a drachm of water containing 7 grains of tartaric. A second solution is then prepared containing twice the proportion of tartaric acid. The glass, having been thoroughly cleaned and dried, is heated to about 120 degrees, and covered with the first solution. In about ten minutes the deposit of silver commences, and is completed in about fifteen minutes more. It is then rinsed and covered in like manner with the second solution; and after about a quarter of an hour it is washed, dried, and polished. Argus.—We shall have pleasure in inserting your communication if you append to it your own name; this is due to the gentlemen whoso name you mention. Honest men, whether they are fearless and outspoken or not, do not make charges against others by name whilst they conceal their own names and shelter themselves in the dark. R. M. G.—Your frequent head-aches may possibly arise from con stantly inhaling the vapour of ether. The first effect of ether is stimulating; the reaction is of a depressing character, and may frequently be attended with head-ache. But remember that head aches are amongst the most frequent symptoms of indigestion, and may arise from many causes, especially long fasting followed by hearty eating, by unsuitable food, by late and heavy suppers, by want of exercise in the fresh air, by sleeping in small ill-ventilated chambers, by excessive use of tobacco or alcoholic stimulants See that you avoid these causes before you attribute your suffering to photography. See that the dark room is as well ventilated as you can make it; and if it be difficult to make the ventilation per* feet, get your employer to aid you. W. C.—Your cards have many good qualities, being generally bright and clean. Nos. 1 and 7 wo like best. The chief defect consists in your use, in many cases, of too light a background. For vignettes, the background you employ is very good, but it is t0 light for figures fully printed out, and gives a somewhat hard effect. Your heads would gain greatly in roundness, delicacy, and vigour if they had a dark background behind them in place of the light one you employ. Henry Hele.—The book to which you refer is not recently pub- lished. It has been out many years, and was reviewed in oU pages about half a dozen years ago. There has not been any ne edition. E. H.—We called once, but without seeing any one who could 81%2 us the information. We will ask the manufacturer to send Pa ticulars by post. B. M.—The patent lens will answer as well as the triple for enlarging 2. Of the three you mention, if you only wish to purchase one, See the triple; if you purchase two, then the other two, leaving " triple. Several Correspondents in our next.
