For thr DESCRIi'TION r/>/,/ .-i/'r/.K.lJ'/OA' of f/jf /}E.IL RODS kc 



/•/••/■J r:i»i i:/ /JfATVIalOOlll/- 4f>- 





il'ioii of ihc Ground of one H.-potlieimfc of iioo Fee 



ud niethod of irnciug ihc Luc itiroug^i the Air byrncin. of ihc BoniiicRo'li 



