tograph ribbon, is laid face downwards upon it. It is allowed to remain there for a few minutes, and on being removed an imprint is left on the composition. On laying another sheet of paper on this, and passing the hand, or a roller, over the back of the sheet, a perfect fac-simile of the typewritten. matter is transferred to the sheet. As many as 100 copies can be taken from one writing in this way. The first few copies are of course the best, as the ink gradually is absorbed, becoming fainter and fainter as each copy is taken off. For a few circulars the hektograph is very useful and expeditious. It is used largely in steamship and other offices, and a knowledge of how to work it should be obtained by the pupil if possible.
COPYING TYPEWRITTEN LETTERS.
It is usual in business houses to keep copies of all letters. Copies are sometimes made by using a copying ribbon on the typewriter, and copying the letter by means of a press in a book made of tissue paper leaves. The typewritten letter is laid face downward on a sheet of tissue paper beneath which is placed a damp linen cloth. The moisture from the cloth passes through the tissue and transfers some of the aniline ink of the typewritten letter to the tissue paper, thus making a fac-simile. To facilitate the transfer the book of tissue paper is subjected to pressure in a letter press. It requires some practice
