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 complexion, let me in. It was Berzelius himself. He welcomed me very cordially, informed me that he had been expecting me for some time, and wished me to tell him of my journey—all this in the German language, with which he was as familiar as with French and English. When he conducted me into his laboratory I felt as if I were in a daze, doubting whether I found myself in reality in these classic walls and in the fulfillment of all my dreams. He took me the first day to the institute, where he gave his lectures to medical students, but which were attended by officers of the army and several of his friends, and which I regularly visited afterward to accustom my ears to the language. This afforded me opportunity to admire his calm and clear delivery, and his skill in performing experiments. In this institute was also the laboratory for medical students, which was presided over by Mosander.” The following day Wöhler at once set to work. He was provided with a platinum crucible, a balance with weights, and a wash-bottle, but had to furnish his own blowpipe, the use of which Berzelius strongly recommended. He was at that time the only pupil, as Mitscherlich, Henry and Gustavus Rose, had preceded him, and Magnus was his successor. The laboratory consisted of two common rooms, with very simple accommodations. There were neither furnaces, nor ventilators, nor water, nor gas. In one of the rooms were two pine tables, at one of which Berzelius had his place, while Wöhler worked at the other. There were the usual cases for reagents, a glass-blowing table, a water-trough, under which stood a pail, and where the cook Anna came every day to wash the soiled vessels. This cook was a famous character, and ruled over the establishment with despotic sway. As she was one day cleaning some vessels, she remarked that they smelt strongly of oxidized muriatic acid. “Look here, Anna,” said Berzelius, “thou must not call it oxidized muriatic acid any longer, but chlorine—that is better.”

Berzelius was at this time engaged upon his beautiful researches on hydrofluoric acid, silicium, boron, and zirconium. It was most instructive for Wöhler to follow these researches and note the methods pursued by the great Swedish chemist. After a hard day's work in the laboratory, Wöhler generally spent his long evenings in studying the Swedish language, and in translating Berzelius's treatises for Poggendorff's “Annalen.” Sometimes Berzelius would retain him at his house, and entertain him with stories of Gay-Lussac, Thenard, Dulong, Wollaston, H. Davy, and other scientific celebrities, with all of whom he corresponded, and whose letters he preserved in separate portfolios. He permitted Wöhler to read his correspondence with these celebrated men, and also to peruse his journal of a visit to Paris and London. When the weather became more moderate and the days grew longer, Wöhler made short excursions to the mines, factories, and mineral deposits of the neighborhood of Stockholm, on some of which occasions he was accompanied by Berzelius. The first analysis which Berzelius