RESEARCHES ON THE VOLATILE HYDKnCAKItu" 



k;t 



2d Series.* 



Formula. (?) 



Boiling-point. 



Ek-mentary 

 diuVn-uoe. 



Diflfereoocof 



boilinp-jHiiut 



pr of T<'ni|MTB- 



ture m thin wht 



wifrilisrT w«»ui<J all 



iktU 



Q4 1*16 



Ci6 H 18 



o 



8-9 

 37.0 

 68.5 



98.1 



127.6 



c 2 n 2 



C 2 II 2 



C 2 H 2 







29.0 

 31.5 



29.5 



o 



0.4 

 0.6 



1.2 

 1.5 



119.6 -T- 1 



Average increment of boiling-point for the addition of C 2 H t 



= 29°.9 

 = 29°.9. 



Formula. 



C24 H 24 



3d Series. (JVbJ completed.) 



Boiling-point. 



174.9 

 195.8 

 216.2 



Elementary 

 difference. 



C 2 H, 

 C 2 H, 



Difference of 

 boiling-point 



found. 



20.9 



20.:; 



Range of Tempera- 

 ture « lihin which tin- 

 substance would all 

 distil. 



41.2 



2 



Average increment of boiling-point for the addition of C 2 H 2 



o 



1.7 



L5 



2.2 



20°.6 



20°.C. 



2. Of the Hydrocarbons obtained from Albert Coal. 



1st Series. {Not completed.) 



Formula. 



Boiling-point 



Cm H 



10 AX 12 



Cio H 



12 x *14 



a. h 



14 



16 



Quj H 18 



59.9 



90.6 



119.7 



Elementary 

 difference. 



C 2 H 2 



0^11, 



C, H , 



Difference of 

 boiling-point 



found. 



Range of Temper*- I 

 .re within which th« 



substance would all 



distil. 



30.7 



29.1 



-9.8 



2 



1.5 



0.. 



0.5 



29°.9 



The average boiling-point difference, in this series, for the addition of 

 C 2 H 2 , is, therefore, 29°.9. 



a quantity of liquid in the retort. 



te constancy of boiling-point as those just cited, 

 petroleum and Albert coal ; which the ranges of 



temperature given in these tables do not indicate. 



from Albert 



have the formula C n H n+2 as here represented, there being some indication that they contain I , of hydrogen. 



d. 



same 



is therefore deferred for a subsequent memoir. 



