Attaching Runners to a Bicycle for Winter Use
Bicycle Fitted with Runners for Snow
Instead of storing away your bicycle for the winter, attach runners and use it on the ice. The runners can be made from 1/4-in. by 1-in. iron and fastened to the bicycle frame as shown in the sketch. The tire is removed from the rim of the rear wheel and large screws turned into the rim, leaving the greater part of the screw extending. Cut off the heads of the screws and file them to a point. The rear runners should be set so the rim of the wheel will be about 1/2 in. above the runner level.
Contributed by C. R. Welsh, Manhattan, Kan.
A Paper That Makes Green Prints
A coating for ordinary paper that is said to give green prints is made with a two per cent solution of gelatine, says Photography, and sensitized with the following solution:
| Potassium Bichromate | 15 gr. |
| Magnesium Sulphate | 15 gr. |
| Water | 1 oz. |
This mixture is spread over the paper in the usual way and the paper dried in the dark. Printing is carried rather far. The print is washed, then surface dried or blotted off on a pad and laid film upwards on a sheet of glass, and the following developer is applied with a wad of cotton wool wrung out: