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A camera lucida attachment for the goniometer

Published online by Cambridge University Press:  14 March 2018

G. F. Herbert Smith
G. F. Herbert Smith*
Affiliation:
Mineral Department of the British Museum
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Extract

When investigating the morphology of crystals, such as those of schwartzembergite, which are so rounded or striated as to afford no definite reflections of the object-slit of the goniometer, the author found most serviceable a camera lucida which could be attached to the eye-piece of the telescope of the goniometer, and thus used for the direct drawing upon paper of the ‘light-figures’ given by the crystals, the ordinary signal being replaced by a pin-hole. The cap of the eye-piece in use is unscrewed and the camera lucida is fixed to the tube by means of four clamping screws.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 15 , Issue 72 , September 1910 , pp. 388 - 389
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1910

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References

1 The block for this figure has been kindly lent by Dr. A. E. H. Tutton, F.R.S., with the permission of Messrs. Macmillan & Co., Ltd, the publishers of his forthcoming book on crystallography.