650 



NATURE 



[Oct. 31, 1889 



to grade 50° ; or, as already stated, 50 per cent, of all 

 the persons tried did worse, and 50 per cent, did better. 

 Therefore the performance in question is exactly medi- 

 ocre. Again, 30 inches corresponds to grade 80° ; in 

 other words, 80 per cent, did worse and the remaining 20 

 per cent, did better. The method on which this diagram 

 is constructed is of universal application. Calling the 



particular class of persons to which it refers, for brevity, 

 by the letters I.H.E. (International Health Exhibition), 

 then the rank of any individual among the I.H.E. males, 

 aged 23-26, in respect to any of the qualities therein 

 named, can be most easily ascertained ; also among the 

 I.H.E. females of the same ages. 

 This method admits of being extended ip more than 



GRADES 0"^ RANK, 0°to 100 

 10° 20° 30° 40° 50° 60° 70° 80° 90° 100° 



I STATURE, WTHOUT SHOES. . 



MALES 63 64 65 



FEMALES 59 60 61 



66 67 68 



MALES 33 34 



FEMALES '32 



HEIGHT SITTING, ABOVE SEAT OF CHAiR. 



.^395 



SPAN OFAI^MS BETWEEN OPPOSITE! FINGER-TIPS 



MALES 16465 6^ 67 68 



FEMALES 5859: 60 61 62 



71 ! 72. 73 i'4 75 



63 I 64 65 66 67 68 



WEIGHT IN USUAL INDOOR CLOTHING 



MALES 120 ' 130 



FEMALES 100 



BREATHING CAPACIT^ 



MALES 166 170 180 190 * 200 2l0 220 230 240 250 260 262 



FEMALES 90 100 110 1 120 * 130 



160 170 80 184 iQ 



KEENNESS OF EYESIGHT. DISTANCE OF READING DIAMOND TyPE. 



MALES ID 15 20 



FEMALES 10 



15 20 



MALES 65 70 



FEMALES 30 35 40 | 45 



STRENGTH OF GRASP. 



80 . 85 



iqo-105 a, 



60 65 ! 70 75 



40 50 60 



90 100 



Fig. I. 



one way. That for which there is most call is where the 

 rank of the quality immediately in question, has to be 

 considered in reference to some other quality. Thus it is 

 of little use to know the breathing capacity of the man 

 unless we also know his stature or his weight. Lungs 

 capacious enough to enable a small man to labour vio- 

 lently without panting would be wholly insufficient for the 



ordinary purposes of a giant, just as an excellent little 

 boiler for a small steam-engine would be ineffective with 

 a large one. The diagram (see Fig. 2) appropriate to the 

 case we are considering, could not be compressed into a 

 single line, but requires many. Successive hnes in that 

 figure refer to the successive statures of 60 inches, 61 

 inches, and so on up to 72 inches. A diagram of breath- 



