A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 221
las-tons reflecting goniome-ter. This instrument isrepresented in Fig. 179.The crystal to be meas-ured, f, is fixed upon amovable support, c?, whichis in connection with thebutton-headed axis of thegoniometer, o, which pass-es through a larger axisin the upright, b ; a is adivided circle, and e its… … DIMORPHISM. 209 faces whose inclination is to be measured, is to be setparallel to the axis of the instrument; and having, bymeans of the button, o, turned the crystal until somedefinite object, such as the bar of a window, is seen dis-tinctly reflected from it, the larger milled head is turned,and…
Chemistry · Physics
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