80 
Analysers: 
I. Prazmowski prism in brass mount, for placing above the 
eye-piece 
II. The same with divided circle 
Complete Polariscopes for the larger stands ^vith 
Abbe condenser; stands I to V inch): 
a) Polariser I and Analyser II (with divided circle) . . . 
b) „ I „ „ I (without divided circle) . . 
Complete Polariscopes for the smaller stands (without 
condenser; stands VI and VII): 
a) Polariser II and Analyser II (with divided circle) . . . 
b) „ II „ „ I (without divided circle) . . 
Those possessing the goniometer eye - piece 
No. 40 may use its divided circle in conjunction 
with the analyser. The price of the polarising 
apparatus is, in this case, therefore, that stated 
for the polarising set without divided circle. 
Eye-piece for observation of axial images. 
For use with Polariser I and Analyser II. Huy- 
ghenian eye-piece 2 with sliding eye-lens combined 
with a collective system consisting of two single 
lenses, which is adjustable to the upper focal plane 
of the objective by a sliding tube. (Fig. 38.) . . 
Series 
MOHL . . 
of 8 selenite and mica films after 
Fig. 38. 
Eye-piece for 
axial images. 
Spectro-polariser, see No. 23. 
