238 Linnean Society. [May 24, 



' A Translation of the Pharmacopoeia of the College of Physicians, 

 explaining the Chemical Decompositions;' 'A Selection of Prescrip- 

 tions, illustrating the terms used by Physicians in prescribing ; ' 

 ' Selecta e Prsescriptis ; ' and ' A General Table of Atomic Numbers, 

 with an Introduction to the Atomic Theory.' In the year 1825, 

 when only two-and-twenty, he succeeded Dr. Clutterbuck as Lecturer 

 on Chemistry at the Aldersgate Dispensary ; and began soon after- 

 wards to collect materials for his ' Materia Medica,' on which sub- 

 ject after a short time he also gave lectures at the Dispensary. In 

 1832 he married, resigned his appointment in favour of his brother, 

 and commenced practice as a Surgeon in Aldersgate Street. He 

 was elected in the following year to the Chair of Chemistry in the 

 London Hospital ; and for six years afterwards he lectured both 

 there and at the New Medical School in Aldersgate Street on Che- 

 mistry, Botany and Materia Medica. His lectures on the latter 

 subject were published by his friend Dr. Cummin in the ' Medical 

 Gazette,' and were translated into German and republished in India. 

 In 1839-40 appeared his ' Elements of Materia Medica,' in two 

 parts, of which a second edition, enlarged and improved, was 

 published in 1842. His acknowledged eminence in this department 

 procured for him in 1839 the appointment of Examiner in Materia 

 Medica in the University of London. In 1840 he obtained from 

 Erlangen the degree of M.D., and immediately afterwards became a 

 Licentiate of the College of Physicians ; and in 1841 he was elected 

 Assistant Physician of the London Hospital. On the establishment 

 of the Pharmaceutical Society in 1842, he gave two short courses of 

 lectures at its rooms, and was appointed its first Professor. In the year 

 1843 he published ' A Treatise on Food and Diet,' and his practice 

 as a physician rapidly increasing he gradually withdrew from his 

 various lectureships, finally relinquishing his Professorship of Materia 

 Medica at the London Hospital in 1850, though he still continued 

 to deliver a winter course at the Pharmaceutical Society. In 1845 

 he was elected a Fellow of the College of Physicians; and in 1851 

 became full Physician at the London Hospital. Of his 'Elements 

 of Materia Medica and Therapeutics,' a new and greatly enlarged 

 edition, the publication of which was commenced in 1849, was in 

 progress at the time of his death. About six weeks before this took 

 place, while referring to a specimen in the Museum of the College 

 of Surgeons, he fell and ruptured one of the extensor muscles of his 

 thigh. By this accident, although it rendered him incapable of 

 moving without assistance, his health appeared but little aff^ected ; 

 but on the night of the 20th of January, on being lifted into bed, he 



