MICROSCOPE ACCESSORIES FOR POLARIZED LIGHT WORK

c. 1910.

POLARIZATION APPARATUS:
Like other polarization kits meant for qualitative work, this kit comes with an analyzer, a polarizer, and a selenite stage. The polarizer is attached under the stage or into the substage. The analyzer is fitted above the stage. This kit provides flexibility in the location of the analyzer, which can be used in the eyepiece cap, or removed from the cap and placed in the accessory tube which fits into the end of the draw tube.

According to the handwritten instruction with this kit, using the eyecap location for the analyzer reduces or cuts-off part of the field of view, but has the advantage, of giving a better 'defining power.'   Use of the eyecap position therefore was recommended for determining the 'form and shape of crystals and other objects... and obtaining a sharper outline.'   The in-tube position was otherwise generally recommended. Two sets of handwritten instructions came with the case. One is 'W. Smith's directions' and the other is signed by 'W. Walton.'   Walton's was meant to be a supplement to the instructions by Smith.