Modern photography in theory and practice : a hand book for the amateur (1899)
Abbott, Henry G., 1858-1905 · Chicago : Geo. K. Hazlitt · leaf 263
221 IN THEORY AND PRACTICE. Prop up the camera on a small box so that the opening which was occupied by the condensing lenses will be exactly opposite the negative. Make two wooden trian- gles and screw them to the back of a drawing board, to hold it in a vertical position, as explained when making… … Fig. 34- focusing cloth over the joint between the camera and box, to shut in any light which might escape. When all is ready, light the lamp and proceed to focus on a piece of white paper on the drawing board, as previously ex- plained. Fig. 54 may help the amateur to understand moi:e readily the…
Photography
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![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial371dodg-110-113.webp)
