This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 edition. Excerpt: ...activities will aid in the removal of worn out materials from the brain and in securing a fresh supply of blood in the cerebrum. It is 'Flechslg: ariiint and Beele, presents strong evidence In favor of the view that energy generated In one part of the brain may be put to use In remote regions. See also Curtli: Inhibition; Fed. Bern., Vol. VI, No. 1, for a valuable discussion of the subject. Fio. 17.--Charts showing the Incrense in the mednllated fibres In the three layers of the brain during the growing period and the decrease In advanced age. Birth, to 79 years (modified from Vulplus). C, third frontal gyrus, left side; D, anterior central gyms, right side; B, first temporal gyrus, left side outer layer;, middle layer; Inner layer. (Donaldson.) important, though, that the relaxing exercises should not demand just as great concentration of attention as the study; the purpose in relaxing, which was argued in the preceding chapter, is to relieve the will, to set it free, when it will return with renewed vigor to mental tasks. The sequence of studies in the day's work is an important subject for the student. The principle governing this matter is dependent upon the neurological fact already discussed, that different regions of the brain have charge of characteristic mental activities. When then the mathematical center has been exercised for a reasonable period, economy would suggest that this be relieved while other areas be employed. To follow one mathematical study by another is not the part of wisdom unless the first has used but a fraction of the available energy. If it were possible it would be advisable to keep the attention concentrated upon a subject, as mathematics or literature, until the energy which can be utilized in that...