Show w 4 n 1 e j ww gk g r 0 6 g om R I 1 gm 1 U M 0 am Z 1 1 1 t i mr 1 e ZW alt M V ak aa 1 l ez e 1 1 M T r arpa 1 V r A OM or of am ta ta oi t the ha 1 Empt loa I 1 A floating b barrier arm er of pumice adne stone IS i olles lies lag S over 1000 1090 yards wide and 15 feet deep dosing closing a seaport to RU all amels as effectually as a boom could do la not the sort of thing one la is likely to forget and yet that W was one on of the results of the Krako toa emotion on thir port part being belok Re Reton toung ng in sunda str straits alts says leisure hours penned formed in a few hours it would almost seem beem to be b the supreme effort of nature in the tb pumice making makin g line were it not that such immense quantities are found at the bottom of the sea a queer place tor for pumice stone but pumice when produced la is really heavy it Is only the air cavities f r i that make it light and a it fi ts becomes mes water logged and dow ri i L most of the pumice we use 4 bope 1 I ope comes come from the laparl fisl j t n north rth of sicily the home of vulcan whence Is the name of one of them and eur cur volcano la is descriptive of the natural feature of which it is the type here are the pumice quarries at monte chierica and its craters monte and forgia vecchia where over 1000 men are at work in the narrow tunnels and galleries lighted by clay lamps of antique form the whole e hillside is berf perforated 0 ra t ed with groups of these tunnels which number between and and are so narrow that the each other in men can hardly paw pass them and just as coal is found in beds alternated with sandstone cind shale so the pumice is in layers between harder lavas and ashes |