190 Dr. J. S. Lombard. On the Propagation of 



Table V. — Comparison of times required for the first sign of the ther- 

 mal change to show itself through 7'6 millims. of sheep's skull. 7'b 

 millims. of sheep's brain, and 3 millims. of sheep's scalp, respec- 

 tively, with apparatus detecting 0°'00ubT-i2 C. 



Degrees of difference of temperature to which the several tissues 



were subjected. 





Bone. 



Brain. 



Skin. 



0-1290° C. 



01470 



01136 



0-13116 : C. 

 015130 

 12020 



12957" |3. 



016450 



012500 



"With the above differences of temperature the times required for 

 the first appearance through the tissues of the thermal change were 

 as follows : — 





Bone. 



Brain. 



Skin. 





2S 4 seconds. 



30-88 seconds. 



17 6 seconds. 





38-0 „ 



5300 „ 



230 „ . . 





230 



2300 



80 



Percentages of the frequency of occurrence of the different times 



noted. 



Eone. 



Brain. 



Skin. 



Times. 



Percentages. 



Times. 



Percentages. 



Times. 



Percentages. 



23 seconds 



53-333 



23 seconds 



44-444 



19 seconds 



60-000 



38 „ 



26667 



38 „ 



27-777 



23 „ 



10 000 



30 „ 



20000 



30 „ 



22223 



16 „ 



10-000 





53 



5"556 



15 „ 



10000 











8 „ 



10000 



Times calculated for 0°T C. on the basis that the time required would 

 be inversely proportional to the degree of difference of temperature. 





Bone. 



Brain. 



Skin. 





37 30 seconds. 



40-490 seconds. 



22-8S0 seconds. 





55S6 „ 



63 706 



29417 „ 





26-29 



27646 



10 000 



