Chemical engineering . al and the chem-ical parts of the subject arc worked out,but to a great extent upnn the mechan-ical questions involved and the meansprovided for conveying the solutions tothe baths and disposing of the productsof the same. The same is really true ofevery chemical process. In the papermentioned, Mr. Browne recorded ina most interesting and humorousway the troubles which he has hadin many years work with pumpsand other accessories in chemicaloperations. .A considerable part ofhis paper dealt with stoneware ap-paratus, which have proven ex-tremely suitable for many chem-ica


Chemical engineering . al and the chem-ical parts of the subject arc worked out,but to a great extent upnn the mechan-ical questions involved and the meansprovided for conveying the solutions tothe baths and disposing of the productsof the same. The same is really true ofevery chemical process. In the papermentioned, Mr. Browne recorded ina most interesting and humorousway the troubles which he has hadin many years work with pumpsand other accessories in chemicaloperations. .A considerable part ofhis paper dealt with stoneware ap-paratus, which have proven ex-tremely suitable for many chem-ical purposes. In connection with this subject,a paper presented by Prof. GeorgLindner, in Karlsnihc, before of German Engineers,and published in this years volumeof the Zeitschrift dcs fcrcinsDcutscher Ingenieurc, containsmuch of interest, giving a reviewof the various stoneware appa-ratus which are now being built inGermany for chemical author also gives mathc- i FIG. 2.— matical formulas for thecalculation of centrifugalpumps and exhausters, forwhich the readers may bereferred to the original Ger-man paper. In the follow-ing we will mainly repro-duce drawings of the stone-ware apparatus described byProf. Lindner. These draw-ings are quite interesting,since they clearly indicate FIG. 3.— MACHINE the details in design in which theydiffer from patterns made of iron. Inorder to get the necessary mechanicalstrength the designs had, of be changed in many details. Fig. I shows a stoneware cock. Itsdesign presented originally difficultieswith respect to tight fitting, but thesedifficulties are considered to have beencompletely overcome long ago. Fig. 2 is a sectional diagram of astirring apparatus; the vertical axleof the stirring mechanism is contin-ued outside of the apparatus in formof a wrought iron shaft coupled tothe driving motor. The main difficulty is here, the junctionbetween the axle and the driving sh


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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902