Abstract

Anyone working with loose mineral grains (especially when using the universal stage) has at some time felt the need of a method of fixing grains on the microscope slide which would permit him to use index oils and retrieve single grains for further studies. Hess (1960, p. 9) has used glycol phthalate, but it is limited to low indexes and at present hard to obtain. Epoxy resin cement appears to be a satisfactory solution to the problem, because it holds the grains, is inert towards standard index oils, isotropic, and easily obtainable. The epoxy resin has a refraction index of 1.55.

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