Mr. Jefferson, he insisted, "will do nothing rashly," His being president may induce me to visit the federal city, and perhaps his seat in Virginia. The seat of government, as may be inferred, had been removed to Washington from Philadelphia. But to the latter center, which still offered many attractions, Priestley journeyed for the third time early in 1801. He was not especially desirous of making this third visit, but as his son and daughter came down a distance of 130 miles on business, he determined to accompany them. True, Congress was no longer there, but there were many interesting people about with whom he had great pleasure. With Bishop White, who was most orthodox and whom he saw frequently, he enjoyed much "Christian and edifying conversation." John Andrews was another favorite. He was a violent Federalist and informed Priestley that the latter had done them (the Federalists) more mischief than any other man, yet these two noble spirits lived in amity, and Priestley several times announced that Dr. Andrews was a Unitarian, which is not the thought today in regard to the latter. It was an eventful year--this year of 1801. Much that was unexpected happened. It brought joy and it brought sorrow. Perhaps it would be just as well to note the scientific progress of the Doctor during this year, for he gave forth the statement that he had succeeded in producing air by freezing water. This production of air was one of his earlier ideas (p. 62), and now he wrote-- The harder the frost was the more air I procured. Further, he announced that on heating manganese (dioxide) in inflammable air no water is formed, and what is rather astounding, he was certain that _azote_ consisted of hydrogen and oxygen. To the _Medical Repository_, which he regarded highly, there was sent a rather thoughtful disquisition on dreams. In it the idea was expressed that dreams have their seat in some region of the brain more deeply seated than that which is occupied by our waking thoughts. A "Pile of Volta" had been sent out from England. It amused him and he studied it carefully when he was led to remark upon the theory of this curious process as follows: The operation wholly depends on the calcination of the zinc, which suffers a great diminution in weight, while the silver is little affected, and all metals lose their phlogiston in calcination, therefore what remains of the zinc in metallic form in the pile and everything connected with that end of it, is supersaturated with phlogiston. More need not be quoted. It was phlogiston and that only which occasioned the electric current. It may properly be added that in this connection he wrote: It is said the inventor of the galvanic pile discovered the conducting power of charcoal, whereas it was one of my first observations in electricity, made in 1766.