Society of Glass Technology · [Sheffield] · leaf 270
mely simple device is very effective in show-ing up the outline of the meniscus. A strip of opaque black paper,such as is used for wrapping photographic plates in, is foldedround the glass tube just below the meniscus as shown in Fig. 1.The top edge of the strip is cut clean and straight and should…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
