Page:Proceedings of the Royal Society of London Vol 4.djvu/244

Rh

John P. Gassiot and Thomas Henderson, Esqrs., were balloted for, and duly elected into the Society.

The reading of a paper, entitled, "On the Nervous System." By Sir Charles Bell, F.R.S., was resumed and concluded.

The author adverting to the papers on the nervous system, which he presented to the Royal Society nearly twenty years ago, recapitulates the train of reasoning which originally led him to the in- quiries in which he has been so long engaged, on the different functions of different classes of nerves, and adduces various pathological facts in con'oboration of the correctness of the ^iews he then entertained. With regard to the spinal ner^-es, cases are related where, in consequence of disease of the bodies of the vertebr8e,the an- terior columns of the spinal cord, and anterior roots of the nerves were affected, and paralysis of the muscles to which those nerves are distributed was produced, while the posterior column of the cord was uninjured, and the sensibility unimpaired. The author next consi- ders the respiratory system of nerves, which he regards as being both muscular and sensitive, and describes as arising from a tract of the spinal cord, on the outside of the corpus olivare, and anterior to the processus ad cerebellum ; and which constitute columns having no decussations wdth one another, as is the case with the other systems. The conclusion he originally formed, that both the phre- nic and the spinal accessory nerves are provided for motion, which he had deduced from the anatomical fact of the former taking a di- rect course to the diaphragm, and the latter a circuitous one for the purpose of associating the muscles of the respiratory organs with those which act on the chest, is, he thinks, amply confirmed by subsequent experiments. He concludes his paper with some re- marks on the supply of blood to the respiratory system of nerves, which supply, being derived from branches of the vertebral arteries, affords an explanation of several pathological phenomena.

A paper was also read, entitled, " On the constitution of the Re- sins. Part IV." By James F. W. Johnston, Esq., M.A., F.R.S.

This paper contains the account of the continuation of the author's previous researches into the constitution of the resins, both as they occur in nature, and as they appear when extracted from the natu- ral products by the agency of alcohol or ether. The great difficulty in this inquiry is to determine when the resin to be analysed is ob- tained in its normal state ; and the author has endeavoured in each case to ascertain this point by repeated analyses of the resins pre- pared under different conditions. He thus arrives at the conclusion, that the resin of scammony extracted from crude scammony by alco- hol, and heated to 260° Fahr., is represented by C40 H33 O^q, con-