| Nitrate of lead | 1 part. |
| Ferrocyanide of potassium | 1½ parts. |
| Distilled water | 25 parts. |
This bath must be filtered before using. Leave the print in this bath till the image turns yellow, then wash in running water. Washing will turn the image white, when it may be immersed in any of the following baths, according to the tones desired:
REDDISH-BROWN.
| Nitrate of uranium | 1 part. |
| Ammonium chloride | 1 part. |
| Water | 10 parts. |
After washing and before drying place the print in this bath, and tone till the desired shade. Wash in two or three changes of water, and dry between clean blotters.
Several prints of a beautiful green tone were sent in during the last photographic contest. One of our members sends the following formula for making the green tones on bromide-paper: Make up a solution of cobalt subchloride 1 part, and distilled water 10 parts. Let it stand for an hour, then filter. Print and develop according to the method given above, and after immersing in the lead bath, wash thoroughly, and place face up in the solution of cobalt. Keep the prints moving gently till the picture gradually assumes a fine green tone. Wash and dry with blotter. The same corespondent also sends the following formula for a reddish-brown or chestnut-color (in the prints sent in there were no clear whites, the high lights having a reddish tint, the paper seeming to have absorbed the solution): Cupric chloride, 1 part; distilled water, 10 parts. Immerse in the lead bath, and place the print, without washing, in the cupric-chloride bath.
The formula given for reddish-brown with uranium is one recommended by Dr. Vogel. It is more reliable than the cupric chloride.
Sepia-brown tones may be obtained on enamelled bromide-paper by using the following toning solution:
| Hypo | 2½ oz. |
| Ground alum | ½ oz. |
| Granulated sugar | ½ oz. |
| Boiling water | 17½ oz. |
Dissolve the hypo first, then add the alum and sugar. This bath keeps well, and can be made up in larger quantity if desired. To use, take two toning-trays, in one of which have a cold bath, and in the other a hot bath. Immerse the prints in the cold bath for a minute or two, and then, without rinsing, transfer them to the hot bath. After toning rinse in an alum bath made in the proportion of one ounce of alum to thirty-five of water. Wash thoroughly, and dry on a ferrotype plate.