At the end of the half-hour the challenged party gave up. Need they have done so had you been present to help them?
Any questions in regard to photograph matters will be willingly answered by the Editor of this column, and we should be glad to hear from any of our club who can make helpful suggestions.
TINTED TRANSPARENCIES.
Every amateur, no matter how successful he may be, now and then spoils a sensitive plate. Though the plate is rendered useless for a negative, it can be made into a pretty transparency with very little trouble. The spoiled plate must first be cleaned from the blackened silver. This is done by placing it in a solution called "Fanner's Reducer," which is prepared as follows:
| Potassium ferricyanide | 3 grs. |
| Hyposulphite of soda | 30 grs. |
| Distilled water | 4 oz. |
Leave the plate in this solution till the silver is all dissolved and the gelatine film which covers the plate is perfectly clear. Rinse it thoroughly in running water, and immerse it for three minutes in a sensitive bath made of
| Bichromate of ammonium | 48 grs. |
| Distilled water | 4 oz. |