...understood from the annexed figure, representing a crystal, whose angle abc is required. The eye, looking at the face of the crystal be, observes a reflected image of m, in the direction Pn. On ™ revolving the crystal till ab has the position of be, the same image will be seen again...

...gives directly the angle needed •on the system of Miller here followed. The eye at P, looking at the face of the crystal, be, observes a reflected...position that the same image is seen reflected by the 343 Many different forms of reflecting goniometer of simple type are in use. The accompanying figure...

...hence gives directly the angle needed on the system of Miller here followed. The eye at P, looking at the face of the crystal, be, observes a reflected...position that the same image is seen reflected by the 343 Many different forms of reflecting goniometer of simple type are in use. The accompanying figure...

...is constructed may be understood by The eye at P, looking at the face of the crystal, be, ooserves a reflected image of m, in the direction of Pn. The...reflected by the next face and in the same direction, I'n. To effect this, the crystal must be turned around, until ubd has the present direction of be....

...hence gives directly the angle needed on the system of Miller here followed. The eye at P, looking at the face of the crystal, be, observes a reflected...direction of Pn. The crystal may now be so changed iu its position that the same image is seen reflected by the 3 43 Many different forms of reflecting...

...the point M be a source of light. The eye at P, looking at the face of the crystal, be, will observe a reflected image of m, in the direction of Pn. The...effect this, the crystal must be turned around, until abd has the The principle underlying the construction of the reflecting goniometer will be understood...