Infant diet : a lecture / by A. Jacobi. Delivered May 8, 1873. Revised, enlarged, and adapted to popular use by Mary Putnam Jacobi, M.D.

  • Jacobi, A. (Abraham), 1830-1919.
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: Infant diet : a lecture / by A. Jacobi. Delivered May 8, 1873. Revised, enlarged, and adapted to popular use by Mary Putnam Jacobi, M.D. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    temperature, and the same thing happens after section of the spinal cord, or certain lesions of the medulla (Tscheschin). This same section is however followed by an elevation of cutaneous temperature, from paralysis of the vaso-motor nerves (Brown Sequard). The internal and external temperatui-e of the body does not, therefore, always correspond; on the contrary, fever has even been defined by certain authors to essentially consist in the withdrawal of heat from the interior, to be distributed at the periphery. This can only be considered an im- perfect statement of the fact, that in fever the elimina- tion of heat from the surface is diminished, as it is when the body is surrounded by an atmosphere approaching its own temperature. Heidenhain has found that UTitar tion of the sciatic nerve produces a greater fall of tem] lerature, when the animal is plunged into a cold bath at the time of the experiment. If fever has been previously induced by the injection of pus, no fall of temperature can be obtained by irritation of the sciatic, unless the animal be in the bath. The author infers that, in health, irritation of the sensitive nerves acts by quickening the circulation on the periphery (stimulating the peristaltic contraction of the small blood-vessels), so that more blood is brought to the sui-face to be cooled. In fever, where the blood-vessels of the periphery are passively dilated, the blood stagnates instead of circulat- ing, and the heat evolved by destructive metamorphosis