antly level, will pre- ple, inexpensive, and portable press for copying let- through the sleeve by two rings held by pins passing vent the flues from burning. ters. The back of the copying book is inserted in a This invention has been patented by Mr. John M. through holes in the reach. A series of… … boys. If you do not explain puzzling things to them, you oblige them to make many experiments before COPYING PRESS, they find out; and though experimental knowledge is best in one sense, in another it’is not, for that which sheet spring metal. The ends of the cylinder are hem- free to turn in the…
Internet Archive · Public domain (published before 1931). Free to use for anything.
