I3Y H . I V . (;Ir41,P:.rT'
'Ihe ol)jc.ct of this pxper. Tvhicli is Jvrittc.11 a t I'mi. I3aiicroft', i-i.riuc,t, is iiot t o present :in!. neii- inf~riiiaiioii.111it t o suggest a line or' t1iouy;lit. 111 thc refilling oi aluniitiuni c h i p to ingot :I loimmiscible in the liquid state burelj- some of them after iolidification, ~ r o u l dbe industrially ucei'ul 17seful emuliioni of paies with n i e t n l ~;ire hard t o find. \-et uniiorml?- porous metals or alloj i might he useful. H a no\-er' hai shon 11that lead, made porou\ hy an indirect method, make> a storage Ijatter> oi four tinir.- the. capacity for the 5ame 17 eight as one with mlid lead plate., 1 h c clieinistr? of colloidi is 1)roi ing oi iiiiineiiie uw t o industrj It i i right tliat thc colloid chemist ihould deal with t h e sj-stem 'ivater, benzene, ioap, at room temperatures at the start, for seldom is much gained by attacking the more complicated problems before the simple ones are solved. Yet when he has flocculated and peptized, frothed and floated, long enough t o bring 5ome semblance of order out of chaos and t o get some working hypotheses on the mechanism and causes of emulsions and suspensions, he mal; find it of use for the clarification of the present somewhat emulsified theories, as well as of practical x-alue, if he will remember t h a t there are other systems than water and oil and other temperatures than o o t o 100'. llIolten metals and alloys, from mercury t o tungsten, also offer their problems of colloid chemistry. And when the colloid chemist shall have solved only a few of the problems waiting for him in t h a t field, the foundrymen and metallurgists a t least, will rise up and call him blessed. , I
' H I Samover I l n g , IO, j o y ( I g I z
"The Production 01 Porou, 1IctaI
