Feb., 11)18] Cattle Temperament 141 



Variations Within the Group. — In making comparisons of 

 variations within the group of animals studied, the composites 

 of all the animals under a given condition were plotted on one 

 sheet, thus facilitating the interpretation of results and making 

 the comparisons more vivid. The following pages then repre- 

 sent the four animals under the same condition, i. e., before 

 during and after feeding. Studying the polygons of the before 

 feeding condition, (Fig. 4), it will be seen that each individual 

 is represented by a distinct composite different from the others. 

 The general conformation and appearance of each would lead 

 to the conclusion that Seven H is the most quiet and Five H 

 the most nervous, and Three H more nervous than Seven H and 

 less so than Two H. In the order of their nervous activity 

 then, they follow. Five H, Two H, Three H, and Seven H, as is 

 indicated by the height, symmetry and narrowness of each 

 polygon. This interpretation based on observation is entirely 

 in accordance with the actual results. The mean and standard 

 deviation of Seven H is G.41 and 2.02 respectively, which 

 increase to 6.69 and 2.57 in Three H, to 6.73 and 3.09 in Two H, 

 and to 8.22 and 4.15 in Five H. A curious fact is here brought 

 out that the coefficients of variability indicate the same order. 

 They follow, Seven H, 31.59, Three H, 38.36, Two H, 46.02, 

 and Five H, 50.49. This is because of the fact that the means 

 and standard deviations do not increase in the same ratio, and 

 the reason they do not increase in the same ratio, no doubt is 

 due to the fact that the before feeding tracings of all the subjects 

 were taken very nearly at the same time before the regular 

 feeding time. (See above.) 



Turning to the polygons of the feeding condition, (Fig. 2), 

 the interesting fact heretofore mentioned is made more striking, 

 that the stimulus of feeding increases the nervous activity of 

 the animal. Comparing the shape of the polygons, the same 

 order of nervous activity is seen, namely — Five H, Two H, 

 Three H and Seven H. The same result is verified by the 

 respective means and standard deviations of the respective 

 animals. Here again the coefficients of variability read directly 

 and conform to the order of nervous activity given above — 

 beginning with 24.76 in Seven H and increasing to 43.12. It 

 will be noted that the coefficients of variability in the before 

 feeding conditions (Fig. 4), are as a whole relatively higher 



