No. 3280. Sloan object glass changer, including 
adapter, spanner and 2 fittings pe esd Oe 
No. 3281. Extra fittings 600 ee 699 Bo OF S80 
No. 3282. Case to hold 3 fittings with object 
glasses attached in dust-tight spring 
holdersm pas ae se Me oa ORL S6 
This takes the place of the revolving nosepiece and has certain 
advantages. 
It consists of an adapter which screws on to the nose of the microscope. 
This adapter has on one side a sloping projection (A), and on the other a 
Aqeeeeeereseeee ze screw clamp (B) with a bevelled nut (C). The adapter is clamped to the 
Neteteseeee a nosepiece of the microscope by a screwed ring (D), which is provided with 
slots, into which a halfpenny will fit, for tightening it up. 
Loose fittings are supplied, one of which is screwed on to each object 
glass. 
Each fitting has a bevelled gap which fits loosely over the bevelled nut 
(C) of the adapter and swings round into position when a turn of the milled 
head (B) forces the fitting against the sloping projection (A) and holds it 
firmly in position. An object glass can be changed almost as rapidly as 
with a revolving nosepiece, and it allows of the use of any number of object 
glasses. Each adapter has screwed studs with clamping screws, which 
form the stops in both directions when the object glass is in the correct 
position. These can be adjusted by means of a spanner supplied for the 
purpose, so that each lens can be centred with an accuracy that is never 
possible with a revolving nosepiece, because the error of each individual 
object glass cannot be compensated for. 
No. 3300. Dust-tight double nosepiece aoe eae Spee RE WW) 
No. 3301. Dust-tight triple nosepiece ane sss aoe 110 0 
No. 3302. Dust-tight quadruple nosepiece see aes TS 10 
oO 
No. 3257, Eyeshade, to shield the unemployed eye 
from light and enable it to remain open 
during observation Sas ails oi 02 0 
No. 3257 
No. 3277. Stage micrometer on 3x1 slip, engraved 
1/10 and 1/100 m/m. ... bs sa ete ONL22 26 
No. 3278. Stage micrometer on 3x1 slip, engraved 
= 1/100 and 1/1000 inch KE an oO 1256 
= =. No. 3276. Eyepiece micrometer, scale 5 m/m., divided 
= =u into 50 parts ... ce = ae OO. 26 
~ 
No. 3810. Eyepiece micrometer, scale 10 m/m., 
divided into 100 parts ae “Be A=) OBLONG 
No. 3511. Eyepiece micrometer, scale 10 m/m., 
mi 
o 
-: divided into 100 parts and cross lines 0 12 
—a = = No. 3812. Step eyepiece micrometer ... ee wee OLS 
. = =e | No. 3265. Glass plate, ruled with cross lines Soe gunn, ae ee © 
= No. 3811, No. 3279. Glass plate ruled in squares, } m/m., } m/m., 
= or | m/m. we Bae Sic als ead Om ORaO 
No. 3812. 
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