8 CONTENTS. 



I'AGF 



CHAPTER III. 



WEIGHT INCREASE OF DIFFERENT PARTS OF THE 



BODY AND INCREASE IN STATURE 65 



Tissue systems Weight changes Significance of 

 changes in proportion Weights of organs Number 

 and size of elements Hypertrophy and hyperplasia 

 Statistical difficulties The dead form a series different 

 from the living Premaxima Deviation from the mean 

 Mortality curve Relation to the statistics of weight 

 Weight and longevity Growth an expression of 

 vigour Stature Direction of first growth Rate of 

 increase Rhythm of growth Relations of the divisions 

 of the day and year to growth. 



CHAPTER IV. 

 THE WEIGHT OF THE BRAIN AND SPINAL CORD ... 84 



Historical Objects of examination Interpretation 

 Constituent elements Sources of error Corrections 

 Reasons for not fusing results Percentage of body- 

 weight Determination of brain-weight in the living 

 Nomenclature Spinal cord Encephalon Subdivi- 

 sions Grey and white matter Chemical reaction 

 Percentage of water Specific gravity \Veight of adult 

 brain Proportional development Weight of the basal 

 ganglia Weight of spinal cord Conclusions. 



CHAPTER V. 



INCREASE OF THE BRAIN IN WEIGHT AND VARIATIONS 



OF THE CRANIUM IN CAPACITY 103 



Table and chart of increase in brain-weight with 

 age Weight at birth Weight in the still-born Early 

 growth Proportional growth Spinal cord Changes 

 in composition Cessation of growth Venn's observa- 

 tions Length and breadth of head Brain-weight in 

 different races Cranial capacity Determination of 

 exact weight. 



CHAPTER VI. 

 VARIATIONS IN BRAIN- WEIGHT 119 



Cranial capacity in various races Giants and d\varfs 

 Brain-weight in animals Relation of the weight of 

 the brain to the weight of the body Nomenclature of 



