ments, and mingle with the simple characters around him, in so cordial a manner, as to make them see nothing in the stranger to set them at a distance from him, or induce them to treat him with reserve. In years after, when surrounded by his literary friends, the philosopher loved to describe the happy hours he spent while under the humble roof of honest John Dybold, from whom he had learned so many good practical lessons in husbandry. From his residence in Norfolk, he made many journeys on foot through other parts of England to obtain information in agriculture, and it was in the course of these rambles that, to amuse himself on the road, he first began to study mineralogy and geology. In a letter to Sir John Hall of Douglas, a gentleman possessed of much taste for science, he says, while on his perambulations, " that he was become very fond of studying the surface of the earth, and" was looking with anxious curiosity, into every pit, or ditch, or bed of a river, that fell in his way, and that if he did not always avoid the fate of Thales, his misfortune was certainly not owing to the same cause." This letter was written from Yarmouth in 1753. With the view of still further increasing his knowledge of agriculture, he set out for Flanders, where good husbandry was well understood, long before it was introduced into Britain, and travelling through Holland, Brabant, Flanders, and Picardy, he returned about the middle of summer, 1754. Notwithstanding all he had seen to admire in the garden culture that prevailed in Holland, and the husbandry in Flanders, he says, in a letter to his friend Sir John Hall, from London, "Had I a doubt of it before I set out, I should have returned fully convinced that they are good husbandmen in Norfolk." Many observations made on that journey, particularly on mineralogy, are to be found in his Theory of the Earth. As he was now sufficiently initiated in a knowledge of agriculture, he wished to apply himself to the practice in his own country; and for that purpose, returned to Scotland at the end of summer. He at first hesitated on the choice of a situation where he might best carry his improved plans of farming into effect, and at last fixed upon his own patrimony in Berwickshire. From Norfolk he brought with him a plough and ploughman, who set the first example of good tillage. It was a novel sight for the surrounding farmers to see the plough drawn by two horses, without an accompanying driver. The new system was, however, found to succeed in all its parts, and was quickly adopted, so that Dr Hutton has the credit of introducing the new husbandry into a country where it has, since his time, made more rapid improvements than in any other in Europe. He resided on his farm until the year 1768, occasionally making a tour into the Highlands, with his friend Sir George Clerk, upon gealogical inquiries, as he was now studying that branch of science with unceasing attention.
While residing on his farm for the last fourteen years, he was also engaged in the sal ammoniac work, which had been actually established on the foundation of the experiments already made by his friend and himself, but the business remained in Mr Davie's name only till 1765, when a copartnership was regularly entered into, and the manufactory carried on in the name of both.
As his farm, from excellent management, progressively improved, it became a more easy task, and to a mind like his, less interesting; so that finding a good opportunity of letting it to advantage, he did so, and became a resident in Edinburgh in the year 1768, from which time he devoted his whole life to scientific pursuits. This change of residence was accompanied with many advantages he seldom enjoyed before ; having the entire command of his own time, he was enabled to mix in a society of friends whose minds were congenial with his own; among whom were Sir George Clerk, his brother Mr Clerk of Eldin, Dr Black, Mr Russel, professor of natural philosophy, professor Adam Ferguson, Dr James Lind, and others. Surrounded by so many eminent
