Minerals in rock sections; the practical methods of identifying minerals in rock sections with the microscope, especially arranged for students in technical and scientific schools . ] which appears as more or less distinct andregular lines or cracks, see Figs. 11 and 12. These cleavage cracks may be parallel or intersect, depending * The indices of a few convenient liquids are : water, ; alcohol, ; glycerine, ; olive oil, ; nut oil, ; clove oil, ; aniseed oil, ; almond oil,; cassia oil, ; monobromnapthalene, ; methylene iodide, t Price 12 mark
Minerals in rock sections; the practical methods of identifying minerals in rock sections with the microscope, especially arranged for students in technical and scientific schools . ] which appears as more or less distinct andregular lines or cracks, see Figs. 11 and 12. These cleavage cracks may be parallel or intersect, depending * The indices of a few convenient liquids are : water, ; alcohol, ; glycerine, ; olive oil, ; nut oil, ; clove oil, ; aniseed oil, ; almond oil,; cassia oil, ; monobromnapthalene, ; methylene iodide, t Price 12 marks. % Crystals that have two good cleavages often develop so that the direction of elon- CLEAVAGE. 23 on the position of the section relative to the cleavage planes of Fig. 13. —Garnet in mica schist, showing fracture and high relief. Franconiaj,N. Y. Cleavage is sometimes best observed by slightl} lowering thecondensing lens under the section. When sections show intersecting cleavage cracks it is often
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkdvannostran
