Prof. T. Carnelley on the Periodic Law. 



15 



Bv Relation 10, (a? -390) 

 0-331) 



> 32, but < 204. 



> 119, but < 287. 



0-286) > 165. 

 11, (a?- 390) > 54, but < 113. 

 (a-331) > 159, but < 207 



(a-286) > 



12, (0-390) > 



(0-331) >44. 



(0-286) >22. 



162, but < 218. 

 14. 



We thus obtain no less than eighteen inferior and fifteen 

 superior limits for the boiling-point of AsBr 3 , none of which 

 overlap ; and as of these the highest inferior limit =490 and 

 the lowest superior limit =498, therefore the boiling-point of 

 AsBr 3 = (490-498)°, mean =494°. The boiling-point, as 

 found by experiment, =493°. 



In order to test this method of calculation completely all 

 the known melting-points and boiling-points of the normal 



Table VIII. 

 Calculation of known Melting-Points and Boiling -Points. 





Calculated 



Melting- 

 point 

 by expe- 



Calculated 



Boiling- 

 point 

 by expe- 



Substance. 



melting-point. 



boiling-point. 















Limits. 



Mean. 



riment. 



Limits. 



Mean. 



riment. 



ClBr 









285-286 



286 



286 



BrBr 



250-257 



253 



251 



327-332 



330 



331 



IBr 



308-310 



309 



309 



389-391 



390 



390 



PBr 3 









439-445 



442 



444 



AsBr 3 ... 



309-310 



309 



295 



490-498 



494 



493 



SbBr 3 



356-364 



360 



363 



548-552 



550 



549 



BiBi-g 



514-514 



514 



480 



749-756 



752 



749 



CBr 4 



271-312 



292 



364 



458-503 



480 



462 



SiBr 4 



257-277 



266 



260 



424-429 



426 



426 



TiBr 4 



295-343 



319 



312 



493-507 



500 



503 



SnBr 4 ... 



325-344 



334 



303 



434-452 



443 



474 



AL,Br 6 ... 



312-324 



318 



363 



503-536 



520 



533 



BBr 3 









351-401 



376 



363 



CaBr., ... 



957-969 



963 



949 









SrBr 2 ... 



939-956 



947 



903 









BaBr ... 



above 857 



a. 857 



1085 











MgBr, ... 



917-981 



949 



971 









ZnBr 2 ... 



554-627 



591 



667 



897-953 



925 



972 



CclBr ... 



aboye 800 



a. 800 



844 









HgBr., ... 



537-561 



549 



517 



576-599 



588 



592 



LiBr 



795-835 



815 



820 









KBr 



964-964 



964 



972 









EbBr 



949-972 



960 



956 









NaBr 



973-981 



977 



981 









AgBr 



684-754 



719 



700 









