274 AIR. 



following simple experiment : Fill a wine-glass with 

 water; cover the top of the glass with a piece of 

 writing paper; turn the glass topsy turvy, and the 

 water will not run out. The paper is used merely to 

 give the air a medium sufficiently dense to act against. 



Q. Why does the BEER RUN FKEELY, imme- 

 diately the VENT PEG is taken out ? 



A. As soon as the vent peg is taken 

 out, air rushes through the vent hole at 

 the top of the tub, presses the liquor 

 down, and forces it through the lap. 



Q. Why does liquor flow reluctantly out of 

 a BOTTLE held upside down ? 



A. Because the upward pressure of 

 the air prevents the liquor from flowing 

 out. 



Q. Why should a bottle be held OBLIQUELY, 

 in order to be emptied of its liquor ? 



A. Because air will then flow into 

 the bottle, and help the liquor out by 

 balancing the upward pressure. 



Q. Why does wine (poured from a bottle 

 QUICKLY) SPIRT about without going into the 

 decanter ? 



A. The liquor fills the top of the 

 decanter (like a cork), and leaves no room 

 for the air inside to escape; therefore, 

 the decanter (being full of air) refuses to 

 admit the wine. 



