RECREATION. 



XXV 



THINGS TO KNOW. 



A test for hypo should be kept ready for 

 use in the dark room as a check against 

 insufficient washing after fixation. As the 

 following keeps well in solution, it is per- 

 haps the most convenient to use: Potas- 

 sium permanganate, 2 grains, potassium 

 carbonate 20 grains, water 40 ounces. Add 

 a few drops of this solution to 20 

 ounces of the last washing water, in which 

 the plates or prints have been allowed to 

 soak for some minutes. If any hypo is 

 present the rose colored tint will change 

 to a dirty greenish yellow and more wash- 

 ing is necessary. 



Paper sensitized with ferric oxalate, ex- 

 posed under a negative, washed in water, 

 and placed in a 2 to 3 per cent, solution of 

 potassium permanganate, develops an image 

 in brown manganese peroxide. After fur- 

 ther washing, immersion for 15 to 30 min- 

 utes in a one to 2 per cent, bath of pyro- 

 gallic acid turns the picture dark brown. 

 A final washing completes the process. 



Metol gives soft negatives, full of 

 detail ; while hydroquinone gives contrast, 

 tending to harshness. With pyro, however, 

 it is possible to obtain almost any type of 

 negative we may require, simply by vary- 

 ing 'the quantity of the various constit- 

 uents. In fact, its elasticity is one of the 

 greatest advantages it possesses. 



A thin negative can be made to give a 

 much stronger print if a piece of yellow 

 tissue paper is gummed over the face of the 

 printing frame. — The Photo-American. 



When developing film allow a little ex- 

 tra time for density. Film is nice stuff to 

 work. The results are O. K. 



Wax dissolved in turpentine will protect 

 the hands and nails from stain. Try 

 it if you object to the looks of a pair 

 of hands that are in pyro several hours a 

 day. — The Professional and Amateur Pho- 

 tographer. 



CELLULOID POSITIVES. 



I cannot understand why positive films 

 on celluloid are not more generally made. 

 The film is simplicity in itself to work, be- 

 ing even more simple than Velox prints, 

 because there is no mounting required. 

 The shadows are deep and full of detail ; 

 the high lights are of that pearly whiteness 

 so desirable in landscape and figure work. 

 A neat gold and white frame makes a most 

 charming combination with the deep shad- 

 ows of these positives. If your negatives 

 are all marked, as mine are, with exposure 

 time for Velox paper, you have only to 

 find the correct exposure time for one and 

 then give any other negative a proportional 

 exposure by the same light. 



Strips of Velox, being cheaper, can be 

 used to test the exposure for any new nega- 

 tive. I expose my positive films by plac- 

 ing them in the printing frame behind the 

 negative, setting it up facing the door at 

 the rear of my dark room, and then open 

 the door for 3 to 15 seconds. — Camera 

 Craft, 



Bausch & Lomb 

 Plastigmat f-6.8 



The perfect Photo Lens, as the picture above shows, 

 is rapid enough for the fastest snapshots, dark-day 

 photography, and interior work. Each system having 

 four lenses, eight lenses in all, giving perfect optical 

 correction, each system may be used separately for 

 distant landscape or portraiture. Plastigmat f-6.8 is 

 suitable for every kind of work. It is the best symmet- 

 rical anastigmat ever produced. Buy your camera 

 with it. Buy it for your camera. 



Catalogue j6g on request. 



Bausch & Lomb Optical Co. 



Incorporated 1866 



New York ROCHESTER, N. Y. Chicago 



FREE 



DESCRIPTIVE 

 BOOKLET ON 



HUMIDITY. 



The Poly meter is an instrument to 

 measure the percentage of relative 

 and absolute Humidity. 



Invaluable in testing the air we 

 breathe, whether too dry or too moist. 



Indispensable in forecasting rain, 

 storms, frost or clear weather. 



ESTABLISHED 1842. 



21 UNION SQUARE. NEW YORK CIT Y. 

 OIL PORTRAITS ON APPROVAL 



If you will send me a photo of yourself or a friend and 

 state color of hair, eyes and complexion I will paint and 

 send you on approval a miniature oil portrait. 



Canvas 6x8 or 8x10 inches, 

 Canvas 10x12 or 12x14 inches, 



$12. 



Z. EMMONS, 58 West J04th St., New York 

 Reference : Mr. G. O. Shields. 



LkU STEREOPTICONS and VIEWS 



for Public Exhibitions, Church Entertainments, for 

 illustrating sermons. Many sizes. All prices. 

 Chance for men with little capital to make 

 money. 260 page Catalogue FREE. 



MCALLISTER, Mfg. Optician, 49 Nassau St., ti, Y, 



