. Manual of mental and physical tests : in two parts : a book of directions compiled with special reference to the experimental study of children in the laboratory or classroom. FIG. 12. PERCENTILES OF VITAL CAPACITr FOB BOYS (SMEDLEY) TEST 5: VITAL CAPACITY 97 to 20 30 40 50 60 70 80 90. Fia. IS PERCENTILES OF VITAL CAPACITY FOE GIELS (SMEDLEY) 98 FHYSirAl> AND MOlOR CAPACITY Schuster found IIk^ <^(mioi:iI con-clniiou Uelwecn vital i-npacityand height to bo -}- Su, ancl tliat betwoen tho same capacityand weight to ho -|- .59. It follows that in osti^niating thestatus of a given individu
. Manual of mental and physical tests : in two parts : a book of directions compiled with special reference to the experimental study of children in the laboratory or classroom. FIG. 12. PERCENTILES OF VITAL CAPACITr FOB BOYS (SMEDLEY) TEST 5: VITAL CAPACITY 97 to 20 30 40 50 60 70 80 90. Fia. IS PERCENTILES OF VITAL CAPACITY FOE GIELS (SMEDLEY) 98 FHYSirAl> AND MOlOR CAPACITY Schuster found IIk^ <^(mioi:iI con-clniiou Uelwecn vital i-npacityand height to bo -}- Su, ancl tliat betwoen tho same capacityand weight to ho -|- .59. It follows that in osti^niating thestatus of a given individuals vital capacity allowance must bemade for his siz(; of body as well as for his age. (4) Dependence on age. The general dependence on age isindicated in the norms already given. It may be mentionedfurther that the most maiked individual differences appear atthe ages when the period of most rapid growth terminates(Smedley). Concerning the further development of vital ca-pacity after the period of adolescence, Beyer, from his studyof naval cadets, concludes that maximal capacity is reached at19, but other authorities place the maximum at 35, with anannual decrease of about 32 cc. thereafter up to the age of 65. (5) Dependence on mode of life. It has been pointed outabove that vita
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