V 



the most complete, consistent, and readable account of the phenomena 

 of mind, and their relation to the actual structure of the brain, which 

 exists. Such topics as Instinct, Mesmerism, Somnambulism, Uncon- 

 scious Cerebration (his own phrase), &c, are discussed in a masterly 

 way, and with an abundance of illustration and knowledge which 

 renders the work one of the greatest value even to those who may 

 differ here and there from its theoretical conclusions. 



About the period of his removal to London Dr. Carpenter began to 

 occupy himself with the minute study of the structure of the calca- 

 reous shells of the Mollusca — being led thereto by a desire to compare 

 the results of the operation of living matter upon distinctly mineral 

 compounds (such as carbonate of lime), by way of comparison and in 

 illustration of the rapidly accumulating knowledge of cell-structure in 

 the softer parts of living things. This study, which resulted directly 

 in some valuable contributions to our knowledge of the structure of 

 shells, shown by these researches to be far more complex than had 

 hitherto been supposed, led on the one hand to Dr. Carpenter's perma- 

 nent identification with the pursuit of research with the microscope, 

 and on the other hand to those admirable investigations of the struc- 

 ture and law of growth of the shells of the minute Protozoic Foramin- 

 ifera which constitute his most weighty contribution to the special 

 literature of science. His microscopic studies bore fruit in the 

 publication of " The Microscope and its Revelations," the sixth 

 edition of which was issued in 1881. The studies on the shells of 

 Foraminifera were continued throughout his life, being published in 

 four memoirs in the " Philosophical Transactions," and in a richly 

 illustrated monograph produced by the Ray Society in 1862, whilst 

 the last of his memoirs in the " Philosophical Transactions " was that 

 on Orbitolites bearing date so late as 1882. It was on this subject 

 that Dr. Carpenter was busy at the time of his death, having during 

 the past few years accumulated a wealth of material and drawings in 

 support of his contention that the Eozoon canadense discovered by 

 Logan in the Laurentian rocks of Canada exhibits the distinctive 

 structure of the shell-substance of the higher Foraminifera. The 

 material relating to Eozoon has been placed by Dr. Carpenter's 

 executors in the hands of Mr. Rupert Jones, who has undertaken to 

 prepare it for publication. 



At the age of forty (1853) r what with his larger and smaller books, 

 his original researches, his lectures on medical jurisprudence at 

 University College, and numerous popular lectures on scientific topics, 

 Dr. Carpenter's life was unusually laborious and productive. 



In 1856 he was appointed Registrar of the University of London, 

 and for twenty-three years administered the onerous duties of that 

 office in such a way as to contribute in no small degree to the success 

 of the University, and above all to the mainteuance of the high 



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