Human tolerance to positive G as determined by the physiological end points.

W I T H the construction of a centrifuge capable of rapid acceleration to high levels of g, it became possible to extend the experimental range of investigation of human tolerance to positive g to levels previously unattainable. Such experiments have been carried out in this laboratory by Beckman, Duane, Ziegler and Hunter. 1,C It is the purpose of this report to present an analysis of the original experimental data obtained by these investigators, and to compare and integrate these results with those observed in other laboratories.