J'hcrc arc cconomical problems of singular iniportnncc to bc faced; tlierc arc, cspccially in Gcrniany, soinc political dangers of great monicnt. European trndc has bcen thrown out of gcnr by the IVar; the most cssentinl rcquircmcnts of good track, credit, confidcncc and stability, arc lacking and it will tnltc two or threc years to establish these ; everything is abnormal mid unstable, tlic iuarlt, thc franc nnd thc pound hare no pcrniaiicnt relation to each other ; a iicw equilibrium lins to bc cstnblishcd and wc have nll to become gradually accustomed to thc n c w conditio~is wliatcvcr tlicy arc beforc trade can be in n healthy stntc again. Crcdit, confidence and stability are of slow growth; no nationalisation, no artificial trcatineiit of natior!nl tlcbts, no dircct action of strilicrs, 110 revolutionary ideas can tdic thcir place. The ngrccincnt with Gcrniaiiy is t o bc wclcomcd t o the cstcnt to which i t cncourngcs credit, confidence and stability ; probnbly this will bc a vcry considcrablo cstent, but it is too early to judge. * * * This \vccli we publish for tlic first time a pnpcr contributed to the Institution of Chcmical Enginccrs. \Vc arc glnd to do this nnd \vd hope that in the future tho Trnnsnctions of thc Institution will be ns important and intcrcsting as this one, a contrihution by Professor Hinclilcy and Nr. Hiinus on "The Effcct of a Currcnt of Air on tlic rate of Evaporation of Wntcr below tlic Boiling Point." Tlie papcr givcs tlic result of about two hundrcd and fifty experiments nnd i t nppcnrs that thesc * Rond nt tho Scroiitl Atinual 1\Icoting of tho hietitiition of Clicinicnl Ihgi~iccrtl, July 10, 1924.