A dictionary of photography for the amateur and professional photographer (1889)
Wall, E. J. (Edward John), 1860-1928 · New York : E. & H.T. Anthony · leaf 220
e hard varnish ... 15 ozs. Methylated spirit . 25 The above varnishes must be flowed over the negative and then dried before a brisk fire. The following may be applied without warming : — (4) Negative varnish 5 ozs. Liq. ammonia *88o — add sufficient to cause the cloudiness first formed to… … of the field of view and in the middle of the plate. The author has used an ordinary double concave spectacle lens mounted on the fron* of the camera, and the eye being placed just at the back of the camera. A better method is by utilising the camera
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Preclarissimũ opus elemento[rum]](https://img.insideoutlibrary.com/img/200/ia-gri_000033125009354198-204-0.webp)
