(Kelly of the Clue Crew gives the clue from a lab.)  Stretch a balloon over a glass, secure with rubber bands, then place a straw on top & you have a simple version of this device that measures air pressure
[DOC] [TLE] Sample [PAR] ... no it so the and that was his with for you had not her but this she which have 
him ... out more then your now into man could our some other any time has than 
very ... thought under eyes same get place though nothing give also young found 
let ... sent four states above sure air alone case passed near already war 
therefore... [DOC] [TLE] The Imperial Age - Scribd [PAR] For those of you that have joined us over the last year, thank you.