To the regularity and variety of his studies, must be added a considerable degree of Mechanical contrivance, which greatly facilitated the execution of many of his compositions. It was however most apparent in his laboratory, and displayed in the simplicity and neatness of his apparatus, which was the great cause of the accuracy of his experiments, and of the fair character which he acquired as an experimental chemist. This was the result in the first instance of a necessary attention to œconomy in all his pursuits, and was afterwards continued from choice, when the necessity no longer existed. I return from this digression which I thought necessary to give the reader a general view of my father’s occupations, and his manner of spending his time, to the circumstances attending the remaining years of his life. At his first settling at Northumberland, there was no house to be procured that would furnish him with the conveniencies of a library and laboratory in addition to the room necessary for a family. Hence in the beginning of the year 1795, being then fixed in his determination to move no more, he resolved upon building a house convenient for his pursuits. During the time the house was building, he had no convenience for making experiments more than a common room afforded, and he was thereby prevented from doing much in this way. Still, he ascertained several facts of importance in the year 1795 on the Analysis of Atmospheric Air, and also some in continuation of those on the generation of air from water. He had however leisure and opportunity for his other studies and in 1795 he published observations on the increase of infidelity and he continued his Church History from the fall of the Western Empire to the reformation.