Reynolds, Osborne, 1842-1912, Brightmore, Arthur William, 1864-, Moorby, William Henry, 1872- · Cambridge [Eng.] The University Press · leaf 244
o expose in succession all parts of the face of the stoneto the more direct action of the spray. When using this apparatus in a warm room, I have found it best to fix apad of blotting-paper over the jet at a height of ten or twelve inches. Thesurface of this pad is cooled by the spray and prevents… … inverted cone of paper, which keeps off radiation without interfering with theaction of the jet. By sticking several splinters of wood pointing downwards into the pad, anumber of stones may be made at once. In the accompanying sketch (p. 228) are shown a medium-sized stone, as wellas one of the…
