Reading time: 3 segments. 

The scroll generates a 1" diameter sphere of protection centered on the reader, and all within this area are immune to the effects of any form of gas — poison gas, breath weapons which are gaseous in nature, spells which generate gas clouds such as stinking cloud and cloudkill, and all similar forms of noxious, toxic vapors. 

The scroll's protection lasts for 5-8 rounds (d4 + 4).