rmed as to preclude scratching, no pho-oils which may have been generated by the treatment issued on the same plan. The apparatus is constructed in matter in what position the pen is held. The pen is made special forms and sizefor use with slight projections or flaps attached to the edges of its in… … tus as made for use in the HEWITT’S SEMICIRCULAR POINTED PENS, home circle. Cut No. 3 isa perspective view of the blocks. in any position, while the slit parts never form cutting edges, with sulpburic acid. The distillation is conducted without Any one desiring further information may get it by…
Internet Archive · Public domain (published before 1931). Free to use for anything.