AMATEUR PHOTOGRAPHY. 



161 



Carbonate of soda 200 grains. 



Sulphite of soda 200 grains. 



Hydroquinone 50 grains. 



Water 10 ounces. 



Cold black tones may be produced by a 

 normal exposure developed with equal 

 parts of stock solution and water, to which 

 has been added one or 2 drops of a 10 per 

 cent, solution of potassium bromide. A 

 more diluted developer and 10 to 20 drops 

 of restrainer will give warmer tones, the 

 rule being that the warmth of tone is in- 

 creased with the amount of bromide used 

 and the length of the exposure given. 



In many cases, for instance in a sea- 

 scape, a slide will be improved by being 

 tinged with blue, or perhaps even colored 

 to a deep blue. The following bath will 

 secure this result: 



No. 1. 



Sulphocyanide of ammo- 

 nium 200 grains. 



Water 32 ounces. 



Carbonate of soda (gran- 

 ular) 2 grains. 



No. 2. 

 Chloride of gold (brown) . . 15 grains. 

 Water 1 ounce. 



To use, add 4 drops of No. 2 to 2 ounces 

 of No. 1, and have bath at a temperature 

 of 74 Fahr. This temperature must be 

 exact. Reduced slides should be toned 

 only after they have been dried. The 

 process of toning can best be judged by 

 viewing the slide by transmitted daylight. 

 When fully toned it will show a pure blue 

 color. 



The following bath produces Bartolozzi 

 red tones: 



No. 1. 



Ferrocyanide of potassium 



(yellow prussiate) 15 grains. 



Water 16 ounces. 



No. 2. 



Nitrate of uranium 30 grains. 



Sulphocyanide of ammo- 

 nium 150 grains. 



Citric acid (crys.) 30 grains. 



Water 16 ounces. 



To use, thoroughly soak the slide in 

 water and place in a bath composed of 

 equal parts of stock solutions Nos. 1 and 

 2, where it quickly takes on a beautiful 

 red hue. Wash in the usual way. 



To secure a bright green slide use: 

 No. 1. 



Oxalate of iron 20 grains. 



Ferrocyanide of potassium. 15 grains. 



Water 32 ounces. 



No. 2. 

 Chromate of potassium. ... 5 grains. 

 Water 16 ounces. 



The slide must be placed in No. 1 until 

 it takes on a dark blue color, when it is 

 given a minute in No. 2 and then dried. 

 This bath has the effect of slightly in- 

 tensifying. 



Another method of securing a blue tone 

 is to soak old or presumably fogged plates 

 in a bath composed of equal parts of the 

 following until the gelatine is perfectly 

 clear: 



No. 1. 

 Red prussiate of potassium 11 ounces. 

 Water 16 ounces. 



No. 2. 



Hypo 1 ounce. 



Water 16 ounces. 



Thoroughly wash, and before drying place 

 in a clean tray and flow over with a solu- 

 tion of 



Citrate of iron and am- 

 monia % ounce. 



Water 1 ounce. 



After allowing it to remain in the bath 

 one minute dry in the dark. Print in con- 

 tact with the negative in daylight until 

 the shadows are slightly browned, a con- 

 dition which can easily be seen by look- 

 ing at the back of the glass. Then flow 

 over it a solution of 



Red prussiate of potassium 2 ounces. 



Water 8 ounces. 



When developed wash in clean water until 

 high lights are clear. Any dry plate can 

 be used, the silver salts being, of course, 

 first removed by hypo, but the finished re- 

 sult is possibly more suitable for a trans- 

 parency than a lantern slide. As trans- 

 parencies, they are striking. 



A simple and easy method of trans- 

 ferring an impression, such as a title, 

 from an engraved block or type, consists 

 in making a kind of transfer paper on 

 which the desired inscription is either 

 written with indelible or waterproof ink, 

 or printed with ordinary printers' ink. 



To make the paper bend the upper left 

 hand edge of a piece of ordinary smooth 

 paper upward at right angles about % 

 inch, and fasten with 3 pins on the right 

 hand lower corner of a smooth board in 

 such a manner that the 2 flat edges of the 

 paper will extend Y\ inch over the edges 

 of the board. Coat the paper by flowing 

 over it a thin solution of insulating 

 varnish made of raw rubber dissolved in 

 benzole. — H. M. Johnstone, in the Photo- 

 American. 



SOME PERTINENT PARAGRAPHS. 

 To prevent pinholes do not, after fo- 

 cussing, swing open the camera back while 

 the dark slide is being sought, as the wind 

 will get into the camera and disturb the 



