Inter-Mountain Farmer | 1902-08-05 | Page 11 | Destruction of Virmin

Destruction ol Vlrmln, It Is well known thnt many diseases nro propngnled hy vermin Flies transport trans-port tuberculosis, mosquitoes sellnvv fever nnl mnltrln, rnts the plague Mr V llnnzen, In tho Annnles do Phnrmncle, nporls tho n nulls of experiments on tho destruction of vermin thut nre of Inime-dlile Inime-dlile practical Importance. Ilodbugd resist re-sist exposure for twints-fotir hours tn nn atmosphere rontntnlng six gmms nf formic aldelisiie per cublo nieti r. With ilklit grains a eerinln number died All perished Willi nine grains per cubic me-lir. me-lir. Ihe gas furnished hj Iho burning ot twenty-ilvo krnltis nf sulphur per cublo cu-blo meter also itestrojed nil these peits Piles nnd mosquitoes are killed by two grains of formic nldch'tdc per cublo meter of nlr. Pleas nre distrojed bj seven grains per cubic meter, or by burning sui-!hur. sui-!hur. Itnts nnd mice nre destroyed by thlrts-stx hou-v exposure to nn ntmos. phere inntnlnlng llftten grains ot formlo nldelivde per cubic meter, hut the full ex. insure of thlrt-slx hours must be given: twenty four hours Is not sulllclent, New York Sun.