94 



M. Achille Caziu on Internal Work in Gases. 



Series II. (August 1867). 



Dry hydrogen. Glass reservoir B. Manometer of sulphuric 

 acid communicating with the tube H' (tig. 2) . 



p,=3*89 atmospheres, ^ 2 =0'55 atmosphere. Temperature 

 between 24°-6 and 25°-l. 



f0 = OHO 



\/i=_lmm 



*=l-9 



6 



10 



13 



19 



25 



60 



-61 



-11 



+4 



+5 



+4 



4-2 







J 0=0-13 

 \h=0 



2-4 



5-4 



89 



13-5 



19 



22 



60 



-67 



-25 



-4 



+4 



+3 



4-3 







J 9= 015 

 \h=-U 



2 



4-8 



7-3 



11 



14 



... 



60 



-67 



-25 



-9 



+ 1 



+3 



... 







J9= 0-18 

 \h= -1 



21 



5 



8 



11-9 



17 



24 



60 



-61 



-22 



-1 



+6 



+4 



4-2 







f 0=0-19 

 \h= +9 



2 



5-3 



8-6 



11-9 



19 



24 



60 



-59 



-15 







+4 



4-2 



4-1 







r 0=o-2 



\h= +1 



21 



5-6 



8-4 



13 3 



179 



24 



60 



-64 



-16 



-1 



+5 



+4 



4-3 







r 0=o-2i 



\h= -3 



21 



4-8 



6-8 



9-3 



12-6 



19 



60 



-63 



-24 



-8 



+2 



+5 



4-2 







J 0=0 52 

 \A=0 



22 



5-4 



9-9 



132 



17 3 



24 



60 



-64 



-17 



+4 



+5 



+3 



4-1 







J 0= 059 

 *U=0 



21 



5-2 



9 



12 



17 



24 



60 



-63 



-17 



+4 



+6 



' +4 



4-2 







J 0= 0-74 

 \h=-\6 



22 



5-3 



8-3 



10-5 



20 



25 



60 



-61 



-13 



+2 



+7 



+ 2 



4-1 







J 9= 0-96 

 l^=-l 



2-6 



9 



129 



192 





24 



60 



-56 



+3 



+ 6 



+3 





+2 







f0= 1-2 



U=-l 



26 



74 



11 



18-6 





27 



60 



-41 







+6 



+4 





+2 







f 0=2-5 

 [A=-4 



3-6 



... 



121 







27 



60 



-18 





+6 







4-1 







/ 0=2-7 

 \h=-4 



39 



"-7 



121 



16-4 





23 



60 



-23 



+4 



+6 



4-4 





4-2 







Series III. (August 1867). 



Dry hydrogen. Glass reservoir B. Water-manometer commu- 

 nicating with the tube H' (fig. 2). 



j5 1 = 3 , 90 atmospheres, /? 2 =054 atmosphere. Temperature 24°. 



/0 = O S -12 



]>=4-2 mm 



*=2-2 



6 



84 



13-4 



18-6 



24 



60 



-107 



-30 



-19 



-8 



-3 



-1 







19= 017 

 \h= + \3 



21 



7-8 





13-6 



18-4 



25 



60 



-105 



-19 





-8 



-3 



-1 







J 0= 0-18 

 \h=+6 



2-3 



5-8 



86 



127 



18-8 



25 



60 



-104 



-29 



-18 



-7 



-4 



-1 







(9= 0-36 

 U=4-4 



24 



5-9 



9-4 



141 



19-7 



23 



60 



-100 



-30 



-19 



-8 



-3 



-1 







We must, only compare the curves which correspond to the 

 same values of 6. In Series II. the curve falls about 60 millims. 

 in two seconds ; it afterwards rises rapidly, reaches the abscissse- 

 axis six seconds later ; it then rises 4 millims. above this axis 



