bids are invited for science lab equlpments, glass slab 75mm ± 5mm x 50mm ± 5mm x12mm ± 2mm clear and bubble free 4 glass prism 38 mm ± 5mm equilateral clear and bubble free 6 magnetic compass 90mm ± 5mm abs plastic one side transparent with paper/plastic printed dial 6 bar magnet 50mm ± 5mm alnico pair with metallic keeper 4 drawing boards 300 ± 10mm x 450 ± 10mm x12mm ± 2mm (soft wood) 4 spring balance 500 gm cap. tubular plastic body transparent 6 stop clock with start stop & fly back action dial size approx. 100mm, divided in 0-60 x 1 sec 1 resistance box plug type 0- 5000 ohms fitted with brass plugs reading values 1, 2, 2, 5, 10, 20, 20,50, infinity,100, 200, 200,500,1000, 2000, 2000,5000 ohms. total 17 plugs. (tolerance in resistivity 5%). plugs with plastic heads, contact blocks made of brass which is fitted on bakelite / hylem / plastic base. the whole assembly fitted on an appropriate polished wooden box 1 optical bench, one meter long, double ms chrome plated rod dia 15mm ±1mms, four uprights (two having slow transverse motions), two lens holders, two optical pins & two caste iron heavy metallic feet with leveling screws. 1 constantan wire 28 swg on a plastic reel 100 gm 1 mirror strip with holder 100 ±5mm x 25 mm ± 2mm, plastic holder 10 meter rod 100cm polished 5 resistance coil (2,5,10,20, ohms with brass terminal (1 each),overall size 75mmx45x35mm + 5mm made of bakelite / plastic material fitted with brass terminals and half round from both sides 1 each voltmeter (0-5v) plastic body with terminal, square type grade a packed in suitable styrofoam case. 3 galvanometer 30-0-30 plastic body with terminal, grade a square type packed in suitable styrofoam case. 3 laclanchee cell comprising of a plastic jar , one piece filled porous pot and one zinc rod with terminals, porous pot should be filled with a mixture of manganese dioxe and carbon 1 ammeter 0-1.5a, plastic body with terminal, square type grade a packed in suitable styrofoam case. 3 battery eliminator 2 amp 0-12 volt in plastic body with indicator in individual cardboard case 2 connecting wire double cloth covered 100gm nett weight , swg – 28 1 convex lens dia 2 inch (±5mm), focal length 15 cm (±1cm), 5 convex lens dia 2 inch (±5mm), focal length 20 cm (±1cm), 5 concave lens dia 2 inch (±5mm), focal length 10 cm (±1cm), 5 concave lens dia 2 inch (±5mm), focal length 15 cm (±1cm), 5 concave lens dia 2 inch (±5mm), focal length 20 cm (±1cm) 5 concave mirror etc. total quantity : 84