Indeed, there are tablets in the British Museum labelled 4500 B.C.; and later researches, particularly those of the expedition of the University of Pennsylvania at Nippur, have brought us evidence which, interpreted with the aid of estimates as to the average rate of accumulation of dust deposits, leads to the inference that a high state of civilization had been attained in Mesopotamia at least 9000 years ago.
In 1789 he exchanged his chemistry lectureship for that of the theory and practice of physic; and when the medical college, which he had helped to found, was absorbed by the university of Pennsylvania in 1791 he became professor of the institutes of medicine and of clinical practice, succeeding in 1796 to the chair of the theory and practice of medicine.
The university of Pennsylvania began systematic excavations in 1889 under the directorship of Dr John P. Peters.
He studied at Woodhouse Grove, at the University of London, and, after removing to America in 1832, at the medical school of the University of Pennsylvania in 1835-1836.
And early times again, we have to chronicle besides Reisner's excavations, 49 those of the university of Pennsylvania (Eckley B.
Hilprecht, The Babylonian Expedition of the University of Pennsylvania (1893 foil.); P. J.
Banks at Bismya (Udab), and those of the university of Pennsylvania at Niffer (see Nippur) first begun in 1889, where Mr J.H.