[ref.193] _Webb. P., ed.:_ Bioastronautics Data Book. NASA SP-3006, 1964. [ref.194] _Foster. J. F.; and Litchfield, J. H.:_ A Continuous Culture Apparatus for the Microbial Utilization of Hydrogen Produced by Electrolysis of Water in Closed-Cycle Space Systems. Biotech. Bioeng., vol. 6, 1964, pp. 441-456. [ref.195] _Callaway. D.; and Margen, S.:_ Nutritional Properties of _Hydrogenomonas eutropha_. Semiann. Progr. Rept., NASA Grant NGR-05-003-(089), 1965. [ref.196] Working Group on Gaseous Environment for Manned Spacecraft: Summary Report. Space Science Board. NAS/NRC, 1963. [ref.197] _Lawton, R. W.:_ Physiological Considerations Relevant to the Problem of Prolonged Weightlessness. Astronaut. Set. Rev., vol. 4, 1962, pp. 1-16. [ref.198] _McCally, M.; and Lawton. R. W.:_ The Pathophysiology of Disuse and the Problem of Prolonged Weightlessness: A Review. AMRL-Tech. Doc. Rept. 63-3, Aerospace Med. Div. (Wright-Patterson AFB, Ohio), 1963. [ref.199] _Smith, R. E.; and Hock, R. J.:_ Brown Fat: Thermogenic Effector of Arousal in Hibernators. Science, vol. 140, 1963, p. 199. [ref.200] _Storer. J. B.; and Hempelman L. H.:_ Hypothermia and Increased Survival Rate of Infant Mice Irradiated With X-rays. Am. J. Physiol., vol. 171, 1952, pp. 341-348. [ref.201] Working Group on Nutrition and Feeding Problems: Summary Report. Space Science Board. Man-in-Space Comm., NAS/NRC, 1963. [ref.202] _Anon.:_ Conference on Nutrition in Space and Related Waste Problems. NASA SP-70, 1964. * U.S. GOVERNMENT PRINTING OFFICE 1966 - O - 798 520 Transcription note The following typographic errors have been corrected: - *p. 2, l. 16:* to be called ‘"exobiology." ——> to be called "exobiology." - *Table III.- Ultraviolet/Maximum:* 10⁸ erg/cm², 2537° Å ——> 10⁸ erg/cm², 2537 Å - *p. 58, l. 14-15:* approximately 300 atm) ——> approximately 300 atm.) - *p. 80, l. -2:* (600-1000 ft=c) ——> (600-1000 ft-c) - *p. 87, l. 1:* 0.2-mM ——> 0.2 mM - *p. 99, l. 1-2:* faintsess ——> faintness - *p. 104, l. 2:* hiberation ——> hibernation - *p. 116, l. 19:* processsing ——> processing - *p. 121, l. 1:* _Hoffman, R. K.,_ ——> _Hoffman, R. K.;_ - *p. 124, l. -10:* _Rosenszweig_ ——> _Rosenzweig_ - *p. 128, l. 29:* AMRL Tech. Doc. Rept. ——> AMRL-Tech. Doc. Rept. Variant spelling: Both forms _microorganism_ and _micro-organism_ have been retained, as quoted from different sources or bibliographic reference titles.