Show rarefied air used for killing moths washington mountain climbers and tire are familiar enough with the disabling and even deadly effect of rarefied air but it has remained tor for scientists to utilize thin air in beneficial ways B E A back and it II T cotton of the department of agriculture have first reported on the work they and others here hare done in using rarefied air to kill ill insects la in articles subject I 1 to their depredations they have found that moths and other insects inside a locked trunk may be killed by exposure tor for a few days to atmosphere from one fifth to one thirtieth of normal A trunk was placed in a vault from which till almost oost all the air was exhausted and after two bays all the mottis were found to have been killed and a few days longer exposure killed other insects w the method Is said bald to be more I 1 effective than fumigation 40 U |