In making photographic silhouettes, as the exposure required is so much less than that necessary for au ordinary portrait, a slow lens can he used. Stretch a sheet across an open doorway where it can he well illuminated from without, and set the camera up in the room, the figure being close against the sheet. Remove from the room any articles likely to throw light on the figure, which should he dressed in black, and focus the dark outline shown on the sheet. A brief exposure must he given, as it is necessary to expose for the sheet only; backed plates must he used to prevent halation, that is, a spreading of light around the edges of the shadow due to the light reflected from the back of the dry plate. Magnesium light is particularly suitable for this work. When 'he feet are to he included, the figure must be supported upon plate glass covered with thin muslin.