An outgrowth of the method used by A. V. Hill to determine the next liberation accompanying the passage of a nerve impulse has resulted in the development of an apparatus by which the osmotic pressure of as small quantities of fluid as .5 cu. mm. may be determined to an accuracy of .1 per cent NaCl. The principle consists essentially in the differential cooling effect produced between the experimental sample and a standard solution when placed in a standard, constant temperature, constant humidity environment. A discussion of the necessary thermocouple loop construction, electrical difficulties, and optical system is included in the report.
Proceedings of the Iowa Academy of Science
©1936 Iowa Academy of Science, Inc.
McCracken, E. C.
"Biological Fluid Osmotic Pressure Determinations,"
Proceedings of the Iowa Academy of Science, 43(1), 270-270.
Available at: https://scholarworks.uni.edu/pias/vol43/iss1/83