So much for what concerns Mr. Stampfer. One sees that the patent above mentioned was not obtained until May 7, 1833. The professor has not been able to place his first publication prior to that time. But, on the other hand, the letter which gives first description of my Fantascope is dated January 20, 1832. Thus my first publication is over a year before that of Mr. Stampfer. As for the time when I first got the idea for this instrument, the idea to which I was also led by the paper of Mr. Faraday, it is difficult for me to be precise; however, the drawing which accompanies that letter proved that I had already at that time finished the first disk and when I recall my labor, the difficulties which I encountered in the first construction and the extreme care which I had given to it, I believe that I can place the invention at about the same time, that is to say, as Mr. Stampfer, in the month of December, 1832. Roget also may be considered a pioneer in this field. In 1834 he wrote that Faraday’s writing had called again to his attention wheel devices and that in the Spring of 1831 he had constructed several “which I showed to many of my friends,” he wrote, “but in consequence of occupations and cares of a more serious kind I did not publish any account of this invention which was last year reproduced on the continent.” From 1835 until 1843 Plateau continued his work and teaching at the University of Liége in his capacity of professor of experimental physics, taking time off to be married in 1840 to Fanny Clavareau. But all the while the man who had helped to bring visual education and entertainment to millions who were to come after him was gradually going blind. He was a popular teacher, despite his handicap. From 1844, when his vision was entirely gone, Plateau worked continually at home, having set up there a laboratory in which friends and relatives acted as his assistants. Plateau himself gave all the instructions to his aids; they reported to him every detail of the results of the experiments and he then dictated the notes covering the work, relying on a remarkable memory. Later the notes would be revised for publication. Plateau supplied the imagination and piercing intelligence; his helpers supplied the eyes and were the reporters. Plateau was the editor. Scientific critics have held that he not only overcame his handicap but actually did better work.