Modern photography in theory and practice : a hand book for the amateur (1899)
Abbott, Henry G., 1858-1905 · Chicago : Geo. K. Hazlitt · leaf 227
ltJ9 IN THEORY AND PRACTICE. it from the front. In making this sweep the film must \ necessarily be on a half circle in order that the lens be the same distance from the film at every stage of … Fig. 43. its turning. When the sweep is completed the lens points to the left, or opposite to where it started, as I ■■; 4j. shown in Fig. 44. When the exposure is made the film is wound up for another exposure, there being an indi- cator which shows when enough film has been brought
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial361dodg-252-311.webp)
