Index. 
pape 
a, a*, A, AA-Objectives . . 20—22 
Achromatic Objectives . . . 19—22 
„ „ combined 
with. Compensating Eye-pieces , 20 
Accessory arrangements for testing 
the fundamental properties of 
microscopical objectives . 24 — 25 
Apertometer 24 
Adjustment, coarse, fine .... 29 
Analysers and Polarisers ... 80 
Apochromatic Objectives : 
Introduction of the „ . . . , 1 
Properties of the „ . . . 7 — 11 
Durability of the „ .... 10 
New constructions .... 11 — 13 
Price list 14 
Magnifications with the Compen- 
sating Eye-pieces . . . 16 — 17 
Apparatus for counting blood 
corpuscles after Thoma . . . 75 
Apparatus for photo-micro- 
graphy 92—99 
Arc lamp, electrical 96 
Arrangements for polarisation 79 — 80 
Axial images , Eye - piece for ob- 
servation of 56, 80 
B-Objective 21—22 
BB-Objective 20 
Babuchin, Stands .... 42—45 
Bertrand's Eye-piece 56 
page 
Bull's Eye Lenses 87 
Browning, Hand Spectroscope after 87 
Body-length for which the ob- 
jectives are adjusted 4 
— of the stands 30 
C Objective 21—22 
CC-Objective 20 
Camera lucida . . . . 56, 77 — 78 
Cap bottles for immersion oil . . 21 
Cases for the stands 31 
Cedar-wood oil 21 
Centering Arrangement for the illu- 
minating apparatus .... 59, 61 
Circles, fully divided 76 
Clamping ring 48 
Compensating Eye-pieces . 15 — 17 
Condenser, achromatic 62 
Condenser systems ... 14, 58, 61 
Correction of the spherical and 
chromatic aberrations . . 1, 5, 7, 8 
Correction Adjustment .... 5 
Covers 14, 113—114 
Cover-glass gauge 76 
Crossed-line Micrometer .... 74 
Crossed-line Stage Micrometer , 74 
Cylinder diaphragms . 30, 32, 58, 61 
D, DD, D*-Objectives . . 19—22 
Diaphragms to insert in the Eye- 
pieces after Ehrlich 74 
