Boston, Mass. : Photo Era Publishing Co. · leaf 236
Gertrude M. Kane. — To Prevent the Fingers Being Stained during the process of development, rub Answers to Correspondents them with a little white vaseline or lanoline. There is a compound sold expressly for this purpose, but the vase- Headers wishing information upon any point in line will answer…
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-stnicholasserial292dodg-455-470.webp)
