The next year (1832) was even a busier one than its predecessor; he was occupied in revising some of his mathematical text-books; in drawing up a Report on Mineralogy for the British Association, described as ‘an example of the unrivalled power with which he mastered a subject with which his previous studies had had but little connexion’; and in writing one of the Bridgewater Treatises, a work which, with most men, would have been enough to occupy them fully during the whole of the three years which had elapsed since the President of the Royal Society had selected him as one of the eight writers who should carry out the intentions of the Earl of Bridgewater. The subject of his treatise is _Astronomy and General Physics considered with reference to Natural Theology_. It is one of Whewell’s most thoughtful and justly celebrated works, on which he must have bestowed much time. During the intervals, however, of its composition, he had not only written the reviews we have mentioned, and others also, to which we can only allude, but had commenced those researches on the Tides, which are embodied in no fewer than fourteen memoirs in the Transactions of the Royal Society, and for which he afterwards received the Royal Medal. No wonder that even he began to feel overworked, and resigned the Professorship of Mineralogy early in the year. He writes to his friend Mr Jones, whom he was always striving to inspire with some of his own restless activity of thought and composition: ‘I am plunging into term-work, hurried and distracted as usual; the only comfort is the daily perception of what I have gained by giving up the Professorship. If I can work myself free so as to have a little command of my own time, I think I shall be wiser in future than to mortgage it so far. Quiet reflexion is as necessary as fresh air, and I can scarcely get a breath of it.’ His friend must have smiled as he read this, for he probably knew what such resolutions were worth. Whewell might have said, with Lord Byron— ‘I make A vow of reformation every spring, And break it when the summer comes about’; for, notwithstanding these promises and many others like them, we shall find that in future years he took upon himself a greater rather than a less amount of work, which he did not merely _get through_ in a perfunctory fashion, but discharged with a thoroughness as rare as it is marvellous.