Literary Notices. clix 



acterized throughout by scientific thoroughness, very truly says that, 

 while it is true that the expression of the emotions receives its most 

 perfect and frequent demonstration in the facial region, it must not 

 be forgotten that the entire periphery is likewise a participant. Three 

 factors enter into the mechanism of expression: I. The storage and 

 discharge of nerve-force from the central nervous system. II. The 

 power of inhibition possessed by the cerebral cortex. III. The 

 trophic changes consequent upon the processes of waste and repair 

 that are constantly occurring in the cerebral cells. As the chief in- 

 hibitory centres seem to lie within the cortex so cortical disturbance 

 or insufficiency is especially likely to produce uncontrolled and spas- 

 modic reflexes. 



The author gives a careful analysis of the manifestations accom- 

 panying different forms of mental disease with numerous half-tone por- 

 traits and closes by recommending that a suitable photographic outfit 

 be made a part of the equipment of every insane hospital. 



Other articles of neurological interest in the Hand-Book are on 

 Meningitis, by Dr. James T. Whittaker; Myelitis, by Dr. Leopold 

 Putzel; Regeneration of Nerves, by E. T. Reichert; Comparative 

 Anatomy of the Nervous System, by C. L. Herrick ; Histogenesis of 

 the Elements of the Nervous System, by C. L. Herrick; Recupera- 

 tive Power of Old Age. The last mentioned paper by T. L. Sted- 

 man gives interesting evidence of the great vitality and resisting 

 power of the aged which, however is not to be explained as due to a 

 measure of independence of the several organs so that local trouble 

 does not affect the system at large but to the fact that the aged have 

 undergone a process of natural selection and therefore have unusual 

 vitality and recuperative power. Pott's paralysis in children, by J. H. 

 Huddleston; Surgery of the Spinal Cord, by W. W. Keen (a very 

 useful and interesting summary of recent progress in operations on the 

 brain is given;) Sympathetic Nervous System, by Dr. Hand Baker; De- 

 velopment of the Organs of Taste, Frederick Tuckerman ; Thought 

 Transference; Richard Hodgson ; Development of the Thymus Gland, 

 by F. P. Mall ; Development of the Thyroid Gland, by F. P. Mall; 

 Pathology of the Thyroid Gland, by Wyatt Johnston ; Waller's Law, 

 by C. L. Herrick. 



The Innervation of the Chromatophores.^ 



The difficulties attending the investigation of the innervation of 

 the chromatophores have been partially overcome by Professor Eberth 



ippefiTH. Mat. Anz., Erganzungsheft VIII, 1S93. Ballov^TZ. Do. 



