Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. Fig. 127. faces more or less imperfectly developed, owing tothe way they are imbedded in the matrix. The appli-cation, however, of an inch power to the microscopegives a fuller insight into the forms. One of themore developed crystals then appears as follows,shewing the icositetrahedron—the ni Om of Naumann,the specific variety of the crystal being apparently2O2. Fig. 126. The colour also appears more distinct, and suggestsa sulistance used in some descriptions (f jewelle
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. Fig. 127. faces more or less imperfectly developed, owing tothe way they are imbedded in the matrix. The appli-cation, however, of an inch power to the microscopegives a fuller insight into the forms. One of themore developed crystals then appears as follows,shewing the icositetrahedron—the ni Om of Naumann,the specific variety of the crystal being apparently2O2. Fig. 126. The colour also appears more distinct, and suggestsa sulistance used in some descriptions (f jewelleryknown as cinnamon stone or essonite. The essonitesbelong to the garnet family, which is divided intomany sections; the essential constituent of all, withi^^, if any exceptions, being silicate of composition, is accompanied liy certain oxides,which, in different specimens, determine the class towhich the various garnets belong. Iron is, of course,present in varying proportions, and in essonite, isbelieved to impart the colouring matter. Lime isanother constant element which has caused essonite (and als
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
