But our future experimental philosopher has not as yet fairly started on the beginnings of his life-work. The possibilities of the book-binding trade were too limited to permit much real progress. A circumstance occurred in the spring of 1812 that shaped his entire after-life. This was the opportunity then afforded him to attend four of the last lectures delivered at the Royal Institution, by the great Sir Humphry Davy. Faraday took copious notes of these lectures, carefully wrote them out, and bound them in a small quarto volume. It was this volume, which he afterwards sent to Davy, that resulted in his receiving, on March 1, 1813, the appointment of laboratory assistant in the Royal Institution. His pay for this work was twenty-five shillings a week, with a lodging on the top floor of the Institute, a very fair compensation for the times. Very congenial were the duties of the young assistant. They were to keep clean the beloved apparatus of the lecturers, and to assist them in their demonstrations. The new world thus opened was full of bright promise. He keenly felt the deficiencies of his early education, and did his best to extend his learning, so that he might be able to make the most of his opportunities. But what he perhaps appreciated the most was the inspiration he received from the great teacher Davy, who was then Professor of Chemistry and Director of the Laboratory of the Royal Institution; for Faraday assisted at Davy's lectures, and in an humble way even aided his investigations, sharing the dangers arising from the explosion of the unstable substance, chloride of nitrogen, that Davy was then investigating. Faraday has repeatedly acknowledged the debt owed to the inspiration of this teacher. Davy also, in later life generously recognized, in his former assistant, a philosopher greater than himself. As the renowned astronomer, Tycho Brahe, discovered in one of his pupils, John Kepler, an astronomer greater than the master, and as Bergman, the Swedish chemist, in a similar manner, discovered the greater chemist Scheele, so when Davy, in after years, was asked what he regarded as his greatest discovery, he briefly replied, "Michael Faraday."