136 



THE MICKOSCOPE 



No. Page 

 3223 123 



— 122 



3352 122 



3219a 



/103 

 \ 52 



1103 

 " \104 



3200a 104 



3201a 104 



— 116 



— 103 



Standard Petrological Microscope, with eye- 

 piece analyser, with cross-wires, polarising 

 prism ; stand only, in case .... 



Independent swing -out and focussing arm, 

 which enables the condenser to be swung out 

 of the axis .... extra 



Becke lens and converging system of lenses, 

 in fitting in stage-plate with small apertures 

 for Becke shadow test to fit under polariser, 

 and plate with apertures of various sizes 

 for limiting the field to fit into eyepiece slot . 



Plain quartz wedge, ungraduated . 



Quartz wedge, cemented on gypsum plate (red 

 1st order), graduated in Retardations . 



High-power Binocular Micioseope, with square 

 stage and rack and pinion focussing and 

 centring substage ; stand only, in case 



Stand as No. 3218, but with detachable 

 mechanical stage ..... 



High Binocular Microscope, with plain circular 

 lotating stage and centring adjustments ; 

 stand only, in case ..... 



Microscope as No. 3219, with addition of 

 circular rotating mechanical stage ; stand 

 onlj', in case ...... 



Interchangeable extra monocular large body, 

 with rack and pinion drawtubes extending 

 to 260 mm. ...... 



Massive Model Microscope, with plain, square 

 stage and attachable mechanical stage, as 

 on page 99, Abbe condenser, dark-ground 

 illuminator in interchangeable mounts, and 

 one extra substage slide ; in case 



Massive Model Microscope, with mechanical 

 stage as illustiated on page 105, with dry and 

 immersion achromatic condenser and focuss- 

 ing dark ground illuminator and one extra 

 substage slide ; in case .... 



Intel changeable high-power binocular body 



extra 



Double extension drawtube, with rack and 

 pinion adjustment . . . extra 



£ s. d. 



24 7 



1 5 



3 15 6 

 2 15 



4 10 



32 10 



38 10 



35 



47 



7 



44 10 



3300 

 3301 

 3280 



3281 

 3282 



3230 

 3231 

 3232 

 3234 

 3236 



NOSEPIECE AND OBJECT GLASS CHANGERS 



20 Dust- tight double nosepiece .... 

 20 Dust- tight triple nosepiece .... 

 20 Sloan object glass changer, adapter, spanner, 



and two fittings ..... 



20 Extra fittings for above . . . each 



20 Case to hold three fittings, with object glasses 



attached in dust-tight spring holders . 



OBJECT GLASSES AND EYEPIECES 



77 li-in. Achromatic object glass (32 mm.) . 

 77 2/3-in. Achromatic object glass (16 mm.) 

 77 1/3-in. Achromatic object glass (8 mm.) ♦ 

 77 1/6-in. Achromatic object glass (4 mm.) . 

 77 1/8-in. Achromatic object glass (3 mm.), Oil- 

 immersion ...... 



11 6 



2 5 

 1 10 

 4 5 



3 15 



6 17 6 



