^e>f zrnn PliMi ■H -ot<-^>^zt ijgjhO^ fEntered at llie Post Office nf New York, N Y.. as Second t'lass Matter. Cnpvriehi. 1808. by Mtinn A Co.] A WEEKLY JOURNAL OF PRACTICAL INFORMATION, ART, SCIENCE, MECHANICS, CHEMISTRY, AND MANUFACTURES. ] Vol. LXXVIII.-No. 18. ["$3.00 A YEAR. NEW YORK, APRIL… … Fig. 1.-A BATTEBY OF SODA DIGESTEBS -VIEW ON- CHABGING FLOOE, SHOWING BINS FOB CHIPS, THE MANHOLES, ETC. chips in a " cjiipper," as described in the preceding article, the thick- ness of the chips in this case being % inch, as against a thickness of from % inch to % inch in the case of the spruce…
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