In psychological thermodynamics, N. Krainsky (dates) was a Russian physician noted for his 1897 volume on the "Law of Conservation of Energy applied to Psychical Activity". [1] Further research is needed to track down the identity of this individual. [2]

References
1. (a) Krainsky, N. (1897). "Law of Conservation of Energy applied to Psychical Activity". Russia.
(b) McDougall, William. (1932). Body and Mind – A History and a Defense of Animism, 3rd ed. (pg. 130). New York: International Publishers.
(c) Adams, Henry. (1910). A Letter to American Teachers of History (pgs. 89-99). Washington.
2. Krainsky, N. – WorldCat Identities.