bids are invited for petrological microscope ( monocular light polarising microscope ) - •head: monocular inclinable body with built in sliding bertrand lens & polarizer•stage: 130mm graduated rotatable stage 360 degree in steps of 5 degree•compensator: mica: 1 / 4th wavelength, gypsum: full wavelength•objectives: strain free p4x, p10x, p40x spring loaded•eyepieces: wf 10x, 15x with cross & 10x with micrometer , petrological microscope ( binocular ) - ?head: binocular inclined at 45 degrees rotatable 360 degrees with slots for retarding plates & sliding bertrand lens?stage: 130mm graduated rotatable stage 360 degree in steps of 5 degree, stage locking facility?compensator: mica: 1 / 4th wavelength, gypsum: full wavelength?objectives: strain free p4x, p10x, p40x spring loaded?eyepiece wf 10x , 10x cross, 10x micro , advanced microscope with reflected & transmitted light - stand - large rectangular heavy stable base with electrical fittings concealed inside.body - the microscope is having binocular head with 45° inclined observation tubenosepiece - precise quadruple revolving nosepiece with precise centering and positive click stops, ensures accurate position of the objectivesstage - compact ball-bearing centerable rotating stage, 140mm diameter, graduated with vernier, lock and two stage specimen clips.focussing - by vertical movement of stage, coarse adjustment by rack-pinion knobs and fine movement by screw-lever mechanism driven by graduated knobsilluminator - koehlers transmitted illuminator with pre-centred 20w tungsten halogen source and integral electric transformer with intensity control is concealed inside the base. input voltage 220v or 110 volts.incident illuminator - reflected light incident illuminator consits of a polarizing unit, slot for filter holders and a 20 watt. intensity control transformer is provided externally.intermediate optical tube - built-in focussable bertrand lens with centre adjustable. built-in analyzer removable from optical path. analyzer can be rotated 90° with a vernier reading to 6. compensator ? and ? / 4 can be inserted in the tube as per requirement.compensator - ?-gypsum plate ( 1st order red compensating plate 560 nanometers ) & ? / 4- mica plate ( 145 nanometers ) .objectives - semi-plan flat achromatic din objectives p4x / 0.10, p10x / 0.25 and p40x / 0.65 sl.eyepieces - widefield eyepieces wf 10x ( paired ) and wf 10x with cross.polarizer - fully rotatable swing-out polarizer and an abbe-condenser n.a. 1.25 with iris-diaphragm.accessories - vinyl cover, duster, cleaning brush, filter, spare bulb, fuse and operating instructions manual.packing - in full mould styrofoam / thermocol container.optional accessories - objectives p 20x and p 60x, micrometer eyepiece wf 10x, micro-photographic equipment, wooden storing cabinet, detachable mechanical stage, etc. , brunton compass - brass made enclosedin leather case , geological hammer - estwing e3-14p 14-ounce pointed-tip rock pick, steel made with rubber handle total quantity : 1