NEW ELTHAM, LONDON, S.E.9 
35 
Quote Stanley’s ‘A’ Catalogue 
plete 
1 i nary 
ms. 
stance 
anions 
d, con- 
eflector I 
lination 
efficient 
theodo- 
size a nd 
h 
ACCESSORIES TO THEODOLITES 
Spare Bubbles 
E 
1 
JX1 
TYPE 
APPROX. DIMENSIONS— 
NS. and METRIC 
SENSITIVITY 
PER DIVISION 
OF 1/20 in. 
(1 -25 mm.) 
A B 
C 
D 
E 
A2I, A25, A26 
Vertical Circle 
3 • 2" 
8-1 cms. 
■4" 
1 0 cms. 
6" 
1 • 5 cms. 
2-9" 
7-4 cms. 
3-6" 
9- 1 cms. 
20 secs. 
A2I, A25, A26 
Plate 
2-2" 
5-6 cms. 
•4" 
1 0 cms. 
■6" 
1 • 5 cms. 
1-8" 
4-6 cms. 
2-5" 
6-4 cms. 
30 secs. 
A40 
Telescope 
3-2" 
8- 1 cms. 
•4" 
1 0 cms. 
•6" 
1 ■ 5 cms. 
2-6" 
6-6 cms. 
3-6" 
91 cms. 
30 secs. 
A40 
Plate 
2 0" 
5- 1 cms. 
•4" 
1 ■ 0 cms. 
-5" 
1 -3 cms. 
1-3" 
3-3 cms. 
2-4" 
6- 1 cms. 
1 minute 
A68 
Telescope 
3 - 19" 
8 1 cms. 
437" 
III cms. 
656" 
1 -66cms. 
2 9" 
7 • 37cms. 
3 6" 
9 15cms. 
1 minute 
A270 Vertical Circle Bubble, complete in brass case, suitable for Theodolites A2I, 
A25 and A26. 
A27I Glass Vial only, for above 
A272 Horizontal Plate Bubble, complete in brass case for Theodolite. 
A273 Glass Vial, only, for above. 
Telescope Bubbles 
If specified at the time of ordering, Theodolites can be supplied with a bubble similar 
to A270 fitted to the telescope, in addition to the usual alidade and plate bubbles. 
A274 Bubble to Telescope. 
When ordering a spare bubble the type and serial number of instrument for which 
it is required must be specified.