Properties of Matter in the Liquid and Gaseous States. 81 



p. 



at. 



13-22 



20-10 

 24-81 

 31-06 



40-11 



at. 

 16-96 



54-33 



106-88 

 145-54 

 222-92 



16-80 



53-81 



105-69 



145-44 



223-57 



Carbonic Acid at 6°-7. 



t\ 6. 



6-90 

 6-79 

 6-73 

 6-62 



6-59 



1 

 14-36 



1 

 23-01 



1 

 29-60 



1 

 39-57 



1 

 58-40 



Carbonic Acid at 63°*7. 

 _JL_ 



17-85 



1 



66-06 



1 



185-9 



1 

 327-3 



63-82 n^ 



Carbonic Acid at 100°. 

 1 

 17-33 



1 



63-97 



63-57 

 63-75 



63-70 



100-38 



100-33 



100-37 

 99-46 

 99-44 



60-22 

 1 



137-1 

 1 



218-9 



1 

 380-9 



e. 

 0-07143 



0-04456 

 0-03462 

 0-02589 

 0-01754 



0-06931 

 0-01871 

 0-00665 

 0-00378 

 0-00277 



0-07914 

 0-02278 

 0-01001 

 0-00625 

 0-00359 



These results fully confirm the conclusions which I formerly- 

 deduced from the behaviour of carbonic acid at 48°, viz. that while 

 the curve representing its volume under different pressures ap- 

 proximates more nearly to that of a perfect gas as the temperature 

 is higher, the contraction is nevertheless greater than it would be 

 if the law of Boyle held good, at least for any temperature at 

 which experiments have yet been made. From the foregoing 

 experiments it appears that at 63°- 7 carbonic acid gas, under a 

 pressure of 223 atmospheres, is reduced to -j-^- of its volume under 

 one atmosphere, or to less than one half the volume it ought to 

 occupy if it were a perfect gas and contracted in conformity with 

 Boyle's law. Even at 100° the contraction under the same press Lire 

 amounts to -g-J-j- part of the whole. From these observations we 

 may infer by analogy that the critical points of the greater number 

 of the gases not hitherto liquefied are probably far below the lowest 

 temperatures hitherto attained, and that they are not likely to be 



Phil Mag, S. 5. Vol. 1. No. 1. Jan. 1876, & 



