336 



RECREA TION. 



One other point may be mentioned. With 

 platinum at the high figure at which it has 

 stood latterly, the saving of the residues from 

 the working of the process is not to be de- 

 spised, and does not entail much trouble. 

 Old baths (developing) are boiled in a por- 

 celain or enamelled iron dish, and a saturated 

 solution of ferrous sulphate added in pro- 

 portion of 34 the volume of the liquid. This 

 throws down the platinum as a heavy black 

 metallic powder. It can be converted into 

 chloride by those who have the necessary 

 chemical conveniences and skill, and may be 

 sent to the refiners. The developing solu- 

 tions are worth treating. The acid baths do 

 not, as a rule, contain enough platinum to 

 make its recovery worth undertaking. 



A GOOD PVRO FORMULA. 



Pyrogallic acid i l / 2 ounces. 



Nitrous or sulphurous acid. . . 20 minims. 

 Water 32 ounces. 



SODA SOLUTION. 



Sulphite of soda (crystals) 6 ounces. 



Carbonate of soda (crystals).. . . 4 ounces. 

 Water $2 ounces. 



TO DEVELOP. 



Pyro solution 1 ounce. 



Soda solution 1 ounce. 



Water 2 ounces. 



TONING SOLUTION. 



Hyposulphite soda 4 ounces. 



Water 16 ounces. 



Will some reader of Recreation please 

 give us a toning and fixing solution that 

 can be used with the former (after prints 

 are made) ? 



A GOOD EIKONOGEN AND HYDROQUINOXE 

 DEVELOPER. 



NO. I. 



Eikonogen 1 ounce. 



Hydroquinone 1 ounce. 



Sulphite soda C. P 3 ounces. 



Water 90 ounces. 



Dissolve the eikonogen in hot water; 

 then add the hydroquinone and soda. 



NO. 2. 



Carbonate potash 5 ounces. 



Water 60 ounces. 



Have the No. 1 and No. 2 in separate 

 bottles, as stock solution. 



To use, take of No. 1 3 ounces, No. 2 

 1 ounce; for time exposures use part old 

 developer or use a little bromide potassium 

 in the developer. 



This developer works well on snap shots 

 or time exposures. 



A. C. S., Franklin Falls, N. D. 



dinary clearing solution used for platinotype 

 paper, which nearly every photographer has 

 ready for use: 



Hydrochloric acid 1 part. 



Water 60 parts. 



The negative should be placed in this after 

 washing, when the yellow stain will disap- 

 pear. The same solution may be used to 

 remove pyro stains from the fingers, etc. 



The above strength is the usual platinotype 

 paper strength, but, if made up expressly for 

 negatives, a 1 in 50 solution would be better. 

 The juice of a lemon is another well-known 

 remedy. I have used the hydrochloric acid 

 bath for a long time, and have never known 

 it fail. 



The following formula is recommended by 

 Professor Lainer for the removal of fog 

 from negatives: 



Potassium iodide 10 grains. 



Sodium hyposulphite, 25 



per cent, solution 2 ounces. 



The plate may be left in this for a con- 

 siderable time without injury and until the 

 fog is completely removed. 



Gelatino or collodio-chloride paper that 

 has been over-printed may be reduced by 

 immersion in the following: 

 Nitrate of uranium, 10 



per cent, solution 5 minims. 



Sodium hyposulphite. . .75 grains. 



Water 1 ounce. 



To tone albuminized paper, after fixing, 

 immerse in — 



Water 2 ounces. 



Ammonium sulphocyan- 



ide 4 drams. 



Chloride of gold 3 grains. 



Potassium hydrate 3 grains. 



The prints must be washed carefully be- 

 fore toning. 



A plate manufacturer goes one better than 

 the Irishman who added a postscript, " If 

 you don't receive this letter, write and let 

 me know." The plate maker recently sent 

 out several gross of plates in the usual card-, 

 board boxes, and on the lid of each was 

 printed, " Don't open this box until you 

 have read the instructions." But the in- 

 structions were inside! 



I have made a large twin lens camera, 

 8x10 lenses, i$y 2 inch focus and use a 

 5x7 plate. It is rather bulky but does 

 great work. I made it to take yachts and 

 animals, especially. Hope I may get a 

 crack at a moose in New Brunswick, next 

 fall, with both camera and rifle. 



Dinwood Lewis, Everett, Mass. 



USEFUL INFORMATION. 



One of the handiest ways to remove the 

 yellow stain from negatives is to use the or- 



I should like to exchange 4x5 views of 

 scenery, etc., for views of prominent places 

 in Washington, D. C. Greater New York, 

 Niagara Falls, etc. 



Clifford L. Higgins, 

 418 West 8th Avenue, Duluth, Minn. 



