1878.] 



the Temperature of the Head. 



459 



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. 



The mean difference of temperature is very unequal on the two sides 

 of the head; thus the mean difference for the 17 spaces, which 

 are, on an average, higher in temperature on the right side than on the 

 left, is 0-0589° C. (0-106° F.) ; while the mean difference for the 17 

 spaces which are of higher temperature on the left side than on 

 the right, is 0-1103° C. (0'198° F.) The smallest differences noted 

 are in the 4th district, 2nd tier, and 5th district, 2nd and 3rd tiers, all 

 right side, and 5th district, 5th tier, left side ; the difference in each 

 case being 0-016° C. (0'028° F.) The greatest difference noted is in the 

 3rd district, 5th tier, left side, namely, 0'264° C. (0'475° F.) The 

 extreme range of difference of temperature is therefore 0'248° C. 

 (0 - 446° F.) The mean difference of temperature of all the observa- 

 tions taken together, irrespective of sides, is 0'087° C. (0'152° 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 two 

 adjoining tiers — 50 observations on each pair of spaces. 



Left side. Bight side. 



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



by 0-1206° C. (0-217° F.) 01093° C. (0-196° F.) 



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



in 5th district, by 0-264° C. (0-475° F.) . . 0'082° C. (0-147° F.) 



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



by 0-158° C. (0-284° F.) 0'144° C. (0-259° F.) 



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



by 0-107° C. (0-192 F.) 0'176° C, (0-316° F.) 



4th tier, higher in temperature than 5th tier, 



by 0-255° C. (0-459° F.) 0-22° C. (0-396° F.) 



5th tier, higher in temperature than 4fch tier, 



in 2nd district, both sides, and in 3rd dis- 

 trict, left side, by 0-135° C. (0-244° F.) . . 0'074° C. (0-133° F.) 

 5th tier, higher in temperature than 6th tier, 



by 0-244° C. (0-439° F.) 0-227° 0. (0-408 F.) 



6th tier, higher in temperature than 5th tier, 



in 4th and 5th districts, by 0-193° C. 



(0-347° F.) 0-115 C. (0-207° F.) 



6th tier, higher in temperature than 7th tier, 



by 0-106° C. (0-19° F.) . . . . . . 0'103° C. (0-185° F.) 



(&.) Comparison of spaces situated in two adjoining districts of the 

 same tier — 50 observations on each pair of spaces. 



2 h 2 



