Caselli did testing in 1863 between Paris and Marseille, a distance of 800 km, which turned out to be successful. French law was enacted then in 1864 for it to be officially accepted. The next year in 1865 the operations started with the Paris to Lyon line and extended to Marseille in 1867. Caselli had invented with the pendulum and writing stylus the first commercial fax system and the birth of the fax cover sheet. The mid-nineteenth century pantelegraph took about two minutes to transmit a sheet of paper by with 25 handwritten words on it. The early twentieth century modern FAX machine takes about one minute to transmit a sheet of paper by with 250 handwritten words on it.