days; maybe it ia





for anti insect-borne disease. A hpwe-
fly ought to become a curiosity~ Fogs
ought to lead flealeas fives of b&i.
Though the insecticidal proper&s of
DDT were discovered in Sw&.refland
in 1939, when the Potato c&p.y `wad
threatenedi tith a&truction i b$ ~ the
Colorado deetle, the scienti& of the'
Rocketellei! For&i&ion muat .be j cred-









diers and eailora.
We have not heard the end of this
story, by long odds. When,& &ar is
over, much of Eurobe will have to
be deloused and ;fmmunized ,`a&ainat
typhus. ;];t is not likely that thi4 ffight-
tul ravages of tyIihua after. th(i last
war, when whole c(nnmunltier I were
declmab$, wili be repeated. `Wei shall
Jtill have; Our reg$eb atjout thei long
delay in +kln,g the most ipf DDT lsf'ter
its first i +Mhesis. i It is 1 the' sto:Sy of
oulfanila@de all oJ,eri ,aga@-the story
of a cherqlst, who hqd `ayrpesl~d lwhat
         /I      1.
he thought tHa* only ;a dye but rkhleb
`turned out to be the f&et advance inads
l)r chemotherapy abet EhcItch~diacov-
ered 006( \If tlye ir MJI %oohl
it ie that hau & do&en jcientibti
lng toge+er aa a t$sm, are qord iikely
to makaj t.h% utinost ud of ai nirii dis-
covery thsi one prima don&C of the
laboratory,