Psychoses Is a Very Serious One and Any Explanation Tending Toward a More Accurate Diagnostic and Therapeutic Approach Requires Earnest Consideration
VOL. 17, 1931 PHYSIOLOGY: LANG AND PA TERSON This theory of mutation would account for differences in the rate of evolution of different organisms, differences in the rate of evolution at different periods in phylogenetic development, the genetic stability of certain genera and species over long periods of time, and the rare occur- rence of mutations in most of the existing species of plants and animals. Evolution would depend, to a considerable extent, on the emergent evolu- tion of the gene-duplication and deficiency of gene material in different quantities and in different structural combinations. Clausen, R. E., "Inheritance in Nicotiana Tabacum. X. Carmine-Coral Variega- tion," Cytologia, 1, 358-368 (1930). Dobzhansky, T., "Translocations Involving the Third and the Fourth Chromosomes of Drosophila Melanogaster," Genetics, 15, 347-399 (1930). Dobzhansky, T., "Cytological Map of the Second Chromosome of Drosophila Melano- gaster," Biol. Zentr., 50, 671-685 (1930). Morgan, T. H., Bridges, C. B., and Sturtevant, A. H., "The Genetics of Drosophila," Biblio. Gen., 2, 1-262 (1925). Painter, T. S., "A Cytological Map of the X-Chromosome of Drosophila Mfelwo- gaster," Science, 73, 647-648 (1931). Stadler, L. J., "The Experimental Modification of Heredity in Crop Plants," Sci. Agr., 11, 557-572 (1931). Sturtevant, A. H., "The Effects of Unequal Crossing-Over at the Bar Locus in Droso- phila," Genetics, 10, 117-147 (1925). A PRELIMINARY REPORT ON FUNCTIONAL PSYCHOSES By H. BECKETT LANG* AND JoHN A. PATERSON** MARCY STATE HOSPITAL, MARCY, N. Y. Read before the Academy Tuesday, November 17, 1931 The problem of the Dementia Praecox, Manic Depressive and Epileptic psychoses is a very serious one and any explanation tending toward a more accurate diagnostic and therapeutic approach requires earnest consideration.
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