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Published online by Cambridge University Press: 14 March 2018
The apparatus to be described has been designed for the cutting of parallel plates and of prisms of crystallized substances in any required direction. The authors have endeavoured to design a small apparatus, simple in construction and easy to manipulate, which at the same time will be capable of yielding results of sufficient accuracy for most optical work on minerals. Several instruments have been devised with the same objects in view, notably those of E. A. Wülfing, G. Halle~ and F. Stöber. The well-known cutting and grinding goniometer of Dr. Tutton is an instrument of an entirely different class.
page 86 note 1 Wülfing, E. A., 'Ueber einen vereinfachten Apparat zur Herstellung orientirter Krystallschliffe.' Neues Jahrbuch Min., 1901, vol. ii, pp. 1–22 Google Scholar.
page 86 note 2 Wülfing, E. A., 'Ueber einen Apparat zur Herstellung von Krystallschliffen in orientirter Lage.' Zeits. Kryst. Min., 1890, vol. xvii, pp. 445–459 Google Scholar.
page 87 note 1 The instrument has been constructed by Messrs. James Swift & Son, Ltd., 81 Tottenham Court Road, London, W.
page 90 note 1 Fine emery, taking at least twenty minutes to settle in water.