. Review of reviews and world's work. ons. M. de Parville describesthe amount and kinds ofgases and solid material thatare ejected from the cratersof active volcanoes. The solidmatter he puts under theheads of lava, incandescentmatter, scoriaB, and pumi-ceous matter. The gases aresulphuric, sulfhydric, car-bonic, and hydrogen, the sul-phuric-acid gas being the onechiefly liberated from thecraters. There are no dead volca-noes, according to this was thought to be dead for manycenturies before its eruption of 79 Ithad not given any sign of life since the firstcolonization of
. Review of reviews and world's work. ons. M. de Parville describesthe amount and kinds ofgases and solid material thatare ejected from the cratersof active volcanoes. The solidmatter he puts under theheads of lava, incandescentmatter, scoriaB, and pumi-ceous matter. The gases aresulphuric, sulfhydric, car-bonic, and hydrogen, the sul-phuric-acid gas being the onechiefly liberated from thecraters. There are no dead volca-noes, according to this was thought to be dead for manycenturies before its eruption of 79 Ithad not given any sign of life since the firstcolonization of Italy by the Greeks, and whenPliny made out his list of volcanoes he did noteven mention it. The sides of the mountainwere covered with vineyards, and at its basewere the populous cities of Herculaneum andPompeii. The warnings of the coming stormwere first received in the year 63, wlien a disas-trous earthquake was experienced, and the shockswere repeated at longer and shorter intervalsuntil 79. Plinys description of the destruction. birds-eye view of VESUVIUS. (This sketch shows the area affected by tlie recent violent eruption. On the extremeright are the stricken districts of Bosco Trecase and Torre Annunziata, quiteclose to the site of Pompeii.) of these two cities is the best and most acc;iratewe have of any volcanic erui)tiou. Tlie twocities were really, modern investigation hasshown, buried by ashes and pumice, not by lava,and comparatively few lives were lost. Hercu-laneum was buried the deeper. In some placesthe de})Osit was thirty-four meters deep, andnever less than twenty. There are at least two hundred and twenty-five of the sleeping mountains in differentparts of the globe, and pi-obably a thousand morewhich •• would like nothing better than to goto work. THE ARGUMENT AGAINST THE METRIC SYSTEM. UNEXPECTED opposition to the proposedadoption of the metric system of weightsand measures by the United States and GreatBritain has been developed recently. The spirit
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1890
