_Mail-marking Machines_, in which provision is made for holding the printing mechanism out of operative position in case a letter is not in position to be stamped; address-printing machines, including machines for printing addresses by means of a stencil; machines for automatically setting and distributing the type, including those in which the individual types are caused to enter the proper receptacle by means of nicks in the type, which engage corresponding projections on a stationary guard plate, and automatic type justifying machines. All such have been invented, developed, and perfected in the last half century. Another invention which has added wonderfully to push the century along, is the _Typewriter_. It has long been said that “The pen is mightier than the sword,” but from present indications, it is proper to add that the typewriter is mightier than the pen. A machine in which movable types are caused to yield impressions on paper to form letters by means of key levers operated by hand, has been one of slow growth from its conception to its present practical and successful form. Some one suggested the idea in England in a patent in 1714. The idea rested until 1840, when a French inventor revived it in a patent. At the same time patents began to come out in England and the United States; and about forty patents in each of these two countries were granted from that time until 1875. Since that date about 1400 patents more have been issued in the United States, and a large number in other countries. It was, however, only that year and before 1880, that the first popular commercially successful machines were made and introduced. The leading generic idea of all subsequent successful devices of this kind was clearly set forth in the patent of S. W. Francis of the United States in 1857. This feature is the arranging of a row of hammers in a circle so that when put in motion they will all strike the same place, which is the centre of that circle. The arrangement of a row of pivoted hammers or type levers, each operated by a separate key lever to strike an inked ribbon in front of a sheet of paper, means to automatically move the carriage carrying the paper roll from right to left as the letters are successfully printed, leaving a space between each letter and word, and sounding a signal when the end of a line is reached, so that the carriage may be returned to its former position--all these and some other minor but necessary operations may seem simple enough when stated, but their accomplishment required the careful study of many inventors for years.