Lerrs anp Buake—On Atmospheric Carbonic Anhydride. 458 
To absorb the carbonic anhydride in the air of the receiver, 
one of the sealed tubes is attached to these tubes as shown, with 
the precautions already mentioned for preventing access or egress 
of air during the attachment, and its ends are then broken off inside 
the india-rubber tubes. By holding or supporting these latter as 
shown, the absorbing solution passes into the receiver. After the 
TN 
Fic. 6. Fie. 7. 
period necessary for the absorption has elapsed, the receiver is 
inverted as shown in fig. 7, and the sealed tube held or supported 
at such an angle that the bulk of the absorbent flows into it. The 
upper end is first detached and sealed off, and then the lower end 
after inverting the tube and allowing the narrow part to drain. 
Before sealing off, it is advisable to repeat the process of transfer 
and retransfer, so as to thoroughly mix the solution. 
SCIENT. PROC. R.D.S., VOL. IX., PART IY. 2L 
