But what principally enabled him to do so much was regularity, for it does not appear that at any period of his life he spent more than six or eight hours per day in business that required much mental exertion. I find in the same diary, which I have quoted from above, that he laid down the following daily arrangement of time for a minister’s studies: Studying the Scriptures 1 hour. Practical writers 1-2 an hour. Philosophy and History 2 hours. Classics 1-2 an hour. Composition 1 hour--in all 5 hours. He adds below “All which may be conveniently dispatched before dinner, which leaves the afternoon for visiting and company, and the evening for exceeding in any article if there be occasion. Six hours not too much, nor seven.” It appears by his diary that he followed this plan at that period of his life. He generally walked out in the afternoon or spent it in company. At that time there was a society or club that assembled twice a week, at which the members debated questions, or took it in turn to deliver orations, or read essays of their own composition. When not attending these meetings, he most generally appears to have spent the evening in company with some of the students in their chambers. It was by the regularity and variety of his studies, more than by intenseness of application, that he performed so much more than even studious men generally do. At the time he was engaged about the most important works, and when he was not busily employed in making experiments, he always had leisure for company, of which he was fond. He never appeared hurried or behind hand. He however never carried his complaisance so far as to neglect the daily task he had imposed upon himself; but as he was uniformly an early riser, and dispatched his more serious pursuits in the morning, it rarely happened but that he could accomplish the labours assigned for the day, without having occasion to withdraw from visitors at home, or society abroad, or giving reason to suppose that the company of others was a restraint upon his pursuits. This habit of regularity, extended itself to every thing that he read, and every thing he did that was susceptible of it. He never read a book without determining in his own mind when he would finish it. Had he a work to transcribe, he would fix a time for its completion. This habit increased upon him as he grew in years, and his diary was kept upon the plan I have before described, till within a few days of his death.