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



skull and scalp combined, given in Tables VIII and IX, to calculate 

 the temperatures which would be found at a point of the outer surface 

 lying over the point of cerebral surface situated 7*5 millims. from the 

 focus of heat. For example, Table III shows us that, at the end of 

 the sixth minute, a point of the brain, situated 7*5 millims. from 

 another point heated o, l C, would have its own temperature raised, 

 by conduction, o, 06679 C, and Table VIII shows us that the trans- 

 mission through skull and scalp combined (which would, of course, be 

 proceeding coincidently) is, at this time, 42*762 per cent. ; hence the 

 temperature of the outer surface would be 0°-02856 C. Tables X 

 and XI show the effects of this indirect transmission to the outer 

 surface. 



Table X. — Effects produced through 7*5 millims. of sheep's skull and 

 3 millims. of sheep's scalp, taken together, lying over a point of 

 cerebral surface 7*5 millims. distant from another point of this same 

 surface, the temperature of which latter point is raised o, l C. 

 The results are calculated from Tables III and VIII. This table is 

 for comparison with Table VIII where the effects of the direct 

 transmission from the heated point are given. 1° of galvanometer 

 is equal to 0°'0006742 0. ; and 0°'l C. is equal to 148°'316 of gal- 

 vanometer. 



Times. 



Averages. 



Maxima. 



Minima. 



Degrees 

 of 



galvano- 

 meter. 



Thermo- 

 metric 

 values. 



Degrees 

 of 



galvano- 

 meter. 



Thermo- 

 metvic 

 values. 



Degrees 

 of 



galvano- 

 meter. 



Thermo- 

 metric 

 values. 



At the end of — 















1 min. 15 sec. 



0-392° 



•000264° C. 



1-087° 



•000733° C. 



0-040° 



•000027° C. 



2 ,., 0„ 



4-873 



•003286 



7-786 



•005249 



0-560 



•000378 



4 „ o ;, 



17-888 



•012060 



45-483 



•030664 



2-122 



•001430 



6 „ „ 



42-360 



•028560 



70-769 



•047712 



9-868 



•006633 



Percentage of heat transmitted. 



Times. 



Averages. 



Maxima. 



Minima. 





0-264 per cent. 



3-286 

 12-060 

 28-560 



0'733 per cent. 



5-249 „ 

 30664 

 47712 „ 



027 per cent. 



0- 378 „ 



1- 430 

 6633 „ 



2. „ ,, 



4 „ „ 



6 „ „ 



