1878.] 



the Temperature of the Head. 



461 



occurrence of relative superiority of temperature for the right and left 

 sides, respectively: Right side, 45*458. Left side, 54*542. The fol- 

 lowing are the spaces in which equality of temperature is most com- 

 monly found : — 



1st Tier. 2nd Tier. 3rd Tier. 4th Tier. 



Districts— 1st, 2nd. 1st, 2nd. 2nd, 3rd, 4th. 2nd, 3rd, 4th, 5th. 



The following are the percentages of superiority of temperature on 

 the right side, on the left side, and of equality of temperature in the 

 total number of observations : — 



Right side — 44*112 per cent. Left side — 52*926 per cent. 

 Equality— 2*962. 



Quantitative comparisons of the two sides. 



The following is a summary of the mean results of 100 comparisons 

 of each pair of symmetrically situated spaces. 



There is a marked difference in the values representing the mean 

 differences of temperature in favour of the right and left sides 

 respectively; thus, the mean difference of temperature for the 11 

 spaces which are, as a rule, in favour of the right side, is 0*186° C. 

 (0*334° F.) ; while the mean difference of temperature of the 16 

 spaces which are generally in favour of the left side, is 0'066 3 C. 

 (0*118° F.). The greatest difference noted is in the 4th district, 3rd 

 tier, right side, namely, 0*386° C. (0*694° F.) The smallest 

 difference noted is in the 2nd district, 4th tier, left side, namely, 

 0*008° C. (0*0144° F.) The extreme range of difference of tempera- 

 ture is 0*378° C. (0*68° F.) The mean difference of temperature of all 

 the observations taken together, irrespective of sides, is 0*115° C. 

 (0*207° F.) 



2nd. — Comparison of spaces situated on one and the same side of the 



Head. 



(a.) Comparison of spaces situated in the same district of adjoining 

 tiers — 50 observations on each pair of spaces. 



Left side. Right side. 



1st tier, higher in temperature than 2nd tier, • ■ 



by 0*112° C. (0*201° F.) .. .. .. 0*103° C. (0*185° F.) 



2nd tier, higher in temperature than 1 st tier, 



in 4th and 5th districts, by 0*062° C. 



(0*111° F.) .. .. .. .. .. 0*0725° C. (0*13° F.) 



2nd tier, higher in temperature than 3rd tier, 



by 0*204°' C. (0*368° F.) 0*157° C. (0*282° F.) 



4th tier, higher in temperature than 3rd tier, 



by 0*302° C. (0*543° F.) 0*345° C. (0*621° F.) 



3rd tier, higher in temperature than 4th tier, 



in 3rd and 5th districts, by 0' . . 0*085° C. (0*153° F.) 



