. Plexus. ed or arisen, involve more or less the notion ofmovement and sensation. The growing mind develops and isdeveloped pari passu with the increasing number of new afferentimpulses that constantly pour in from all parts of the process continually opens up new medullated tracts. Inmarshalling, contrasting and rearranging all these new implses,the cerebral cortex develops new association pathways as shownby their simultaneous myelination. If the mental phenomenadeclare themselves in outward acts and in the form of bodymovements, the newly myelinated tracts will gradually appearin
. Plexus. ed or arisen, involve more or less the notion ofmovement and sensation. The growing mind develops and isdeveloped pari passu with the increasing number of new afferentimpulses that constantly pour in from all parts of the process continually opens up new medullated tracts. Inmarshalling, contrasting and rearranging all these new implses,the cerebral cortex develops new association pathways as shownby their simultaneous myelination. If the mental phenomenadeclare themselves in outward acts and in the form of bodymovements, the newly myelinated tracts will gradually appearin the efferent projection system as well as in the we have presented a scheme, far from perfect to be surebut yet far more rational and scientific than anything that hashitherto been suggested, by which one may study the physicalbasis of mind, of intelligence and of all those psychic mani-festations which fall under the general heads of memoryintellect, will, imagination, etc. 100 State F. GREGORY GONNELL, M. D., Adjunct Professor of Clinical Anatomy and Instrustor in Surgery. College of Physicians and Surgeons, Chicago. PROGRESS IN F. Gregory Connell, M. D. Adjunct Profecsor of Clinical Anatomy and Instructor in Surgery College ofPhysicians and Surgeons. Chicago. The closing of a century brings with it a natural desire tolook forward; hoping to see, as if in a mirage, what that wonder-ful space of time—the next century, may bring forth. At the same time, the old or present century still clings,bringing further offerings, as if loath to yield its place in thecycle of time, and demanding a backward glance. To judge ofthe future we must review the past. Standing today on the thereshold of the 20th century, wehave no fear of stretching or sullying the truth when we makethe statement that more progress has been made in the presentcentury, in all branches of science, than in any, or all precedingcenturies. And if this be true in the main when applie
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