SCIENT. PROC. R. DUEL. SOC, N.S., VOL. XIII. 



PLATE XXXI U 



40 50 60 70 80 

 N? 9. Air. 



40 60 80 



N? 10. Air. (copper tube) 



Apparen t " mean velocity cm/Sec. 

 40 60 80 200 20 40 

 N? 12. Air. 



190 200 210 220 230 240 250 260 270 280 



N? 13. Air. (Copper tube) 



90 

 80 

 70 



90 

 80 

 70 



Diameter 1 ■ 9 cms . 

 pressure 2S -7" ^ 

 temperature 16 "C 



nean Velocity \ 



100 120 140 160 



N? 14. CO2 (Copper tube) 



Diameter 2 • 05 cms 

 pressure 29-8" 

 temperature J5''C ' 



Mean Velocity 



80 100 120 



N? 15. CO2 



140 



N? 16. CO, 



N? 17. (CO2 mixture) 



