244 



RECREATION. 



No. 2 Pyro Solution: 

 Water 80 oz. 



Sulphuric acid l A drachm. 



Pyro 1 oz. troy. 



For use, mix No. 1 and No. 2 in equal 

 parts. 



To make the same developer with hy- 

 drometer test: Carbonate of soda, 40 oz., 

 hydrometer test 40 ; sulphite of soda, 40 

 oz., hydrometer test 40°. 



Mix the 2 for alkaline solution and use 

 pyro solution as above. 



Increasing the pyro gives greater in- 

 tensity; diminishing it, less. If the devel- 

 oper is used the second time the nega- 

 tives become more intense and develop 

 more slowly after the first, so that a longer 

 exposure is required if old developer is 

 used. The temperature of developer is of 

 great importance. In cold weather it 

 should be 65 to 75°; in hot weather, 6o° 

 to 65 . 



Metol and Hydrochinon Developer: 



Metol Va oz. 



Hydrochinon l A oz. 



Water 80 oz. 



Sulphite of soda (crystals) 4 oz. 



Carbonate of soda (crystals) .. ..2^/2 oz. 



Dissolve in the order given. 



If above works too energetically dilute 

 with pure water until the desired result is. 

 obtalied. 



Acid Fixing Bath. — No. 1: 



Hypo 2 lbs. 



Water 3 qts. 



No. 2: 



Water 1 Qt. 



Sulphuric acid (add slowly) y 2 oz. 



Sulphite of soda (crystals) 4 oz. 



Chrome alum 3 oz. 



After ingredients are thoroughly dis- 

 solved pour No. 2 solution into No. 1. In 

 cold weather the sulphite of soda and 

 chrome alum may be omited from No. 2 

 solution. 



This bath removes all pyro stains and 

 gives a clear film; also hardens the gela- 

 tine so there is much less danger of in- 

 jury to the negative while washing. 



Let negatives remain in the fixing bath 

 at least 5 minutes after they become clear, 

 and then wash thoroughly. , 



All plater should be carefully dusted with 

 a soft camd's-hair brush before exposure 

 to remove adhering particles of dust, thus 

 avoiding pinholes. 



LENS ADAPTER. 



Trie use or or'hochromatic plates for pro- 

 ducing betzer color values in negatives, 

 especially ki tht Dice accurate rendering 

 of the different eolors in a painting, is now 

 quite extensive. 



But it is difficult for the average amateur 



photographer, provided with a folding 

 camera of popular size, like a 4 X 5 or 5 X 

 7, to carry additional plates and holders for 

 obtaining such results. Nearly as good 

 pictures may be obtained by photographing 

 through colored screens on ordinary 

 plates. For distant, or telephoto, views, 

 a special additional expensive lens is usu- 

 ally required. 



To assist the amateur in greatly varying 

 and utilizing the lens he already possesses 

 to the purposes above described, as well as 

 several others, Mr. U. Nehring, of New 

 York, has lately introduced what are 

 termed multichromatic ampliscope lenses, 

 arranged to be inserted adjacent to the dia- 

 phragm of the lens used. These lens adapt- 

 ers change the character of the focus cf 

 the regular lens, either by elongating or 

 shortening it, thereby adapting the lens to 

 take a view with a less or greater angle 

 than it ordinarily would. 



The front lens in the lens tube is un- 

 screwed out and the adapter lens dropped 

 in next to the diaphragm, after which the 

 front lens is rescrewed in place, the change 

 being easily rr.zdz. When one is cramped 

 for the proper distance to secure a pic- 

 ture, die adapter will shorten the focus 

 sufficiently to enable the operator to ob- 

 tain a picture of the right size at a wider 

 angle. Special colored lenses are inserted 

 in the same way, adapted to secure the best 

 effects in photographing paintings and 

 other colored objects. Other adapters ren- 

 der the lens suitable for copying at short 

 distances, and for enlarging. In adapting 

 a lens for telephoto work a special tube is 

 provided which is slipped over the regular 

 lens tube and carries a negative lens for 

 extending the cone of rays, thereby great- 

 ly lengthening the focus and magnifying 

 the image of the distant object. 



There is also an angular disk which will 

 cut off half the picture when thrown on 

 the plate, so that duplicate, or so-called 

 double, pictures can be easily made. A 

 focusing lens is also included. In all, some- 

 thing like a hundred different combina- 

 tions, it is said, can be made with the sev- 

 eral lenses and tubes, and all put in a box 

 small enough to be readily carried in one's 

 pocket. 



This collection of auxiliary lenses and 

 adapters promises to be very serviceable 

 to amateurs, in consequence of the varied 

 quality of work that can be done withou<. 

 the need of different expensive lenses. — 

 Scientific American. 



A PORTABLE CHANGING BAG. 

 How often amateur photographers find 

 themselves on a trip away from a dark 

 room, or anything that can readily be con- 

 verted into one. To carry a lantern and 



