62 



EXPErUMENTS WITH IONIZED AIR. 



The air from a gasometer train after pjissiijg tlie desiccator {U) and the stop- 

 cock i'" is charge<l with imclei liy tlie ioiii/-er y, containing pellets of phosphorus 

 between strips of wire gauze. It then traverses the condenser LK, and thence 

 enters the color tube. The gasometer has already been descril)ed (figure 1, Chapter 

 11.), where M is a large Mariotte Hask, Fthe volume Hask, U the pressure gauge, 

 D the desiccatoi-. 



3. MetJuxl and results. — The method of observation was as follows : the two 



r k ■ ^ \ V W v ~ 



-3^ 



K 



«\V^\\^V VVS\V\^'vV\V\M 



-f" 



■ \\\\\\\\\ w\\\ \\\ \ \ \\ \: 



Fig. 2. 



I 



e) 



^ 



Earth <- 



K 



C 





Fig. I 



1 



V 



^f 



Fic. I. — Disposition or Color Tiihk, Coxdicnser, Electrometkr, and Gasometer Train. Scale ,'„. 

 Fii;. 2 — TiHULAR Condenser Slightly Enlarged. 



sets of data to be ol)taine(l, viz., the readings at the v'olume flask and at the electrom- 

 eter, were taken in consecutive minutes, the stopcock /' having been previously 

 adjusted to show any desired color in the steam tube. From observations at 15 

 seconds apart at the gasometer flask, I obtained two sets of results toi' the discharge 

 of air per second, the pressure of the jet (/>), the temperature of the inflowing air 

 (0, by the thermometer 7' in the figure), the pressure of the air in T' and its 

 temperature. 



Meanwhile the condensei' li.id lieen charged to its full potential, and after 

 breakin<rthe char^inLC circuit, the leakage of the electrometer wasobserved each 15 

 seconds. This furnished two sets of data for the initial electric current. 



