(I) After decades of experimentation, the first practical and fairly reliabie typewriters arrived on the market in the early 1870s. (II) Over the next fifteen years or so they became established in American offices and were soon regarded as indispensable. (ili) But they were large and ungainly. (IV) Obviously, these early models printed under the roller, so you couldn't see what you had typed till several lines later. (V) Indeed, one of the early models was built into a table, like a sewing machine and had a pedal to operate carnage return,