tilation of tunnels is the use of chemic...
Parent Issue
Day
28
Month
September
Year
1882
Copyright
Public Domain
OCR Text
tilation of tunnels is the use of chemicals for absorbinz the impurities of the ai r. A "chemical lung," based upon this principie, has been put to satisfactory test in London by a number of ssientists.
Article
Subjects
Old News
Ann Arbor Democrat