the Elements Carbon, Boron, and Silicon. 



293 



Table (continued). 



Sixth Series 

 N =6030. 





G. 



T. 



N. 



W. 



Co-264« 



Boron 



Glass 



Boron 



Glass 



Boron 



Glass 



0-651 

 0-375 



0-651 

 0375 



0-642 

 0384 



265-6 

 263-4 

 261-8 



449-2 

 443-8 

 437-9 



74-50 

 73-59 

 72-62 



0-3075 

 0-2142 



03058 

 0-2141 



0-3071 

 0-2141 



Mean 





263-6 









0-3068 



Wj 63 ' 6 = 80-872. 



From these values of W the following values for the specific 

 heat of boron are deduced : — • 



y-3H 



•trrO-O 



w -79'2 

 79-2 



026-6 



w 53'32 



w o-o 

 " 53-32 



y?6-7 



w 100'06 • r 53-32 

 "o-o "~ w 00 



46-74 





w 151'6 w 100-06 



0125-8 



51-54 





u* 292-9 w 151-6 



vv o-o ""'o-o 



J/177'2 



513 





W 263'6 w 202-9 



__ "o-o ~ W 00 



01915 



: 0-2382 



= 0-2737 



0-3069 



.0-3378 



=0-3663 



Values of ^. 

 AT 



•000706 from -40° to +25*. 



0-000708 from 25° to 75 ( 



•00676 from 75° to 125°. 



•000601 from 125° to 175°. 



0000508 from 175° to 230°. 



These results show that the specific heat of crystalline boron 

 varies, within the temperature-interval —80° to +260°, in a 

 manner exactly analogous with that of the variation of the specific 

 heats of both modifications of carbon. As with these, so in the 

 case of boron there appears to be an inflection-point in the 

 neighbourhood of 0°. The wonderful agreement between the 

 variation in the specific heats of boron and carbon from —80° 

 to + 260° makes it almost certain that at higher temperatures 



