92 Prof. Tyndall on the Absorption and Radiation 



absorption of the sum exhibits the influence of sifting in an in- 

 structive manner. Tables VI., VII., VIII., IX., and X., thus 

 treated, give the following comparative numbers : — 



Table XI. — Carbonic Oxide. 

 Length of chambers. Sum of absorptions. Absorption of sum. 



2-8 



46-6 





19-7 



12-9 



8-0 



41-1 





21-8 



12-9 



122 



37-2 





22-9 



129 



15-4 



34-0 





23-1 



13-4 



17-8 



31-6 





23-1 



13-3 



36-3 



13-1 





22-9 



13-4 







Means 



223 



13-1 





Table XII.— 



Carbonic Acid. 





2-8 



46-6 





22-4 



13-3 



8-0 



41-4 





22-6 



130 



12-2 



372 





224 



130 



15-4 



34-0 





23-9 



13-9 



23-8 



25-6 





231 



131 



36 3 



13-1 





21-6 



12-3 







Means 



22-6 



13-1 





Table XIIL- 



-Nitrous Oxide. 





2-8 



46-6 





49-0 



33-9 



12-2 



37-2 





53-1 



32-0 



15-4 



34-0 





53-2 



320 



17-8 



31-6 





55-8 



32-7 







Means 



52-8 



32-7 





Table XIV.- 



-Olefiant Gas. 





2-8 



46-6 





100-7 



67*7 



8-0 



41-4 





109-5 



67-5 



12-2 



372 





109-4 



650 



15-4 



34-0 





115-9 



67-0 







Means 



108-9 



66-8 





Table XV.- 



-Olefiant Gas. 





12-2 



37-2 





124-8 



76-3 



15-4 



34-0 





131-8 



77-1 



19-8 



29-6 





138-2 



77-0 



23-8 



25-6 





139-4 



77-6 



363 



13-1 





1331 



78-8 



Means 133-4 77'3 



