[ 272 ] 



XLI. On the Heat of Vapours and on Astronomical Re- 

 fractions. By John William Lubbock, Esq., Treas. 

 M.S, F.R.A.S. and F.L.S., Vice- Chancellor of the University 

 of London, #c. 



[Continued from vol. xvi. p. 569.] 



On the Vapours of JEther, Alcohol, Petroleum, and Oil of 



Turpentine. 



r |^HE following Table is extracted from a valuable paper 

 X by Dr. Ure in the Phil. Trans, for 1818.* 



Table of the pressure of the vapours of aether, alcohol, petro- 

 leum or naphtha, andoil of turpentine. 



iEther. 



Alcohol 



sp.gr. 0-813. 



Alcohol sp. gr. 0-813. 



Petroleum. 



Temp. 



Pressure. 



Temp. 



Pressure. 



Temp, 

 r 



Pressure. 



Temp. 



Pressure. 



Fahr. 





Fahr. 





Fahr. 





Fahr. 





o 



Inch. 



o 



Inch. 



o 



Inch. 



o 



Inch. 



34 



6-20 



32 



0-40 



193-3 



46-60 



316 



30-00 



44 



8-10 



40 



0-56 



196-3 



50-10 



320 



31-70 



54 



10-30 



45 



0-70 



200 



53-00 



325 



34-00 



64 



13-00 



50 



0-86 



206 



60-10 



330 



36-40 



74 



16-10 



55 



100 



210 



65-00 



335 



38-90 



84 



20-00 



60 



1-23 



214 



69-30 



340 



41-60 



94 



24-70 



65 



1-49 



216 



72-20 



345 



44-10 



104 



30-00 



70 



1-76 



220 



78-50 



350 



46-86 







75 



80 

 85 

 90 



2-10 

 2-45 



2-93 

 3-40 



225 

 230 

 232 



236 



87-50 



94-10 



97-10 



103-60 



355 



50-20 



2nd. 



iEther. 



360 

 365 

 370 



53-30 

 56-90 

 60-70 



105 



30-00 



110 



32-54 



95 



3-90 



238 



106-90 



372^ 



61-90 



115 



35-90 



100 



4-50 



240 



111-24 



375 



64-00 



120 

 125 



39-47 

 43-24 



105 

 110 



5-20 

 6-00 



244 

 247 



118-20 

 122-10 







Oil of 



Turpentine. 



130 



47-14 



115 



7-10 



248 



126-10 











135 



51-90 



120 



8-10 



249-7 



131-40 



Temp. 



Pressure. 



140 

 145 



56-90 

 62-10 



125 

 130 



9-25 

 10-60 



250 

 252 



132-30 

 138-60 







„° . 





150 



67-60 



135 



12-15 



254-3 



143-70 



304 



30-00 



155 



73-60 



140 



13-90 



258-6 



151-60 



307-6 



32-60 



160 



80-30 



145 



15-95 



260 



155-20 



310 



33-50 



165 



86-40 



150 



18-00 



262 



161-40 



315 



35-20 



170 



92-80 



155 



20-30 



264 



166-10 



320 



37-06 



175 



99-10 



160 



22-60 







322 



37-80 



180 



108-30 



165 



25-40 







326 



40-20 



185 



116-10 



170 



28-30 







330 



4210 



190 



124-80 



173 



30-00 







336 



45-00 



195 



133-70 



178-3 



33-50 







340 



47-30 



200 



142-80 



180 



34-73 







343 



49-40 



205 



151-30 



182-3 



36-40 







347 



51-70 



210 



166-00 



185-3 



39-90 







350 



53-80 







190 



43-20 







354 

 357 

 360 

 362 



56-60 

 58-70 

 60-60 

 62-40 



[* Or Phil, Mag., First Series, vol. liii. p. 95.] 



