RECREATION. 



325 



PHOTO POINTERS. 



M. Sollet, in his new book, gives the fol- 

 lowing formula for sensitizing postcards : 



Distilled water 1 ounce 



Silver nitrate 45 grains 



Uranium nitrate 450 grains 



Ninety per cent, alcohol to 4 ounces 



Apply to well sized paper. It gives a 

 brown image to be fixed in weak hydro- 

 chloric acid. 



A modification of Farmer's reducer is 

 recommended by Dr. Shirenburg, which 

 consists of 3 solutions as follows : One 

 containing 5 per cent, of hypo, another 5 

 per cent, of hypo and 10 per cent, sodium 

 carbonate, and the third 5 per cent, of po- 

 tassium ferricyanide. The addition of the 

 second solution to the usual mixture of 

 the other 2 makes it slower in working, 

 and tends to prevent any yellow staining 

 of the film. 



There are 2 methods for restoring faded 

 prints, both relying on the conversion of 

 the image into a chloride and redevelop- 

 ing. The prints must be removed from 

 their mounts, then immersed in either of 

 the following : 



Mercuric chloride, 5 grains or... 10 g. 

 Hydrochloric acid, 1 minim or... 2 c.c. 

 Water, 1 ounce or 1,000 c.c. 



Potassium bichromate, 10 grains or 20 g. 



Salt, 15 grains or 10 g. 



Hydrochloric, 5 minims or 10 c.c. 



Water, 1 ounce or 1,000 c.c. 



Leave' the print in till thoroughly 

 bleached, wash well for at least an hour in 



nning water, then expose to daylight, and 

 redevelop with hydroquinone, metol, or one 

 of the^newer developers, and the result is 

 a bla^fc linage. — The Photo- American. 



- ! 



It has been demenstrated that running 

 water is not s© sure a means of thoroughly' 

 removing the chemicals from prints as is 

 the process of changing them from one tray 

 to another. To do this as it should be done, 

 the prints should be allowed to soak at 

 least 10 minutes in each fresh water, han- 

 dling them one at a time from tray to tray 

 and pushing each print well under the sur- 

 face as the change is made. Twelve 

 changes made in this manner will remove as 

 much as can be removed by several hours 

 of treatment in running water. The same 

 course should be pursued with plates, except 

 of course each plate must have its own tray. 



For bromide prints that curl up and be- 

 come hard and unyielding, the same remedy 

 will give relief. Soak the finished print in 

 a mixture of glycerine 5 ounces and water 

 24 ounces, and all trouble will come to an 

 end. When dry, they will lie flat, be flexi- 

 ble, and lose their stiff, refractory, charac- 

 ter. — Exchange. 





■ wt,,n;j; i 



A New Folding 



POCKET KODAK 



THE 



N0.3A 



Broader 

 in scope 

 than any* 

 thing heretofore attained 

 in Pocket Photography. 



Takes pictures of new size 



and shape, 3X x 5K inches. 



Price, = = $20 



Kodak Developing Machine for No. 3A, $7.50 



EASTMAN KODAK CO. 



Kodak Catalogue by mail 

 or at the dealer's. 



ROCHESTER, N. Y. 



From each dozen sheets 

 or ROTOX developing 

 photo paper you can 

 surely obtain twelve per- 

 fect prints. It prints from 

 negatives too thin for other 

 papers; is easier to manip- 

 ulate and has a range of 

 latitude that is unequaled. 



PLATINUM BLACKS 



Prices, per dozen, thick or 

 thin, rough or smooth: 4x5, 

 15 cents; 5x7, 30 cents; 

 6Hx8%; 55 cents; 8x10. 

 70 cents. 



IvOTO GRAPH, the best bromide paper, same prices. 



Sample copy of the Photo Critic, containing, every 

 month, articles on " The A to Z of Photography." 

 Of interest to amateur and professional, sent FREE. 



Subscription, $1.00 per pear. Write 

 R0T0GRAPH, Dept. V, 101 5th Ave., New York City 



