bids are invited for upights of optical bench (with lens / mirror holder) - upights of optical bench (with lens / mirror holder) , upights of optical bench ( for optical needle) - upights of optical bench ( for optical needle) , optical needle for optical bench - optical needle for optical bench , travelling microscope - travelling microscope , concave mirror - concave mirror , simple pendulum of same size but different masses ( different metals) (with hook) - simple pendulum of same size but different masses ( different metals) (with hook) , copper wire ( for electical connection ( electrical) in mtrs - copper wire ( for electical connection ( electrical) in mtrs , crocodile clips - crocodile clips , index needle for optical bench - index needle for optical bench , battery dry cell of 9v (duacell only) - battery dry cell of 9v (duacell only) , plane mirror strip - plane mirror strip , resistance box 500 ohm - resistance box 500 ohm , battery eliminator - battery eliminator , dip circle - dip circle , convex lens - convex lens , fractional weight box - fractional weight box , pn junction diode apparaturs - pn junction diode apparaturs , convex mirror - convex mirror , concave lens - concave lens , magnifying lens - magnifying lens , solenoid + soft iron - solenoid + soft iron , galvanometer - galvanometer , ammeter - ammeter , volt meter - volt meter , digital weighing scale - digital weighing scale , hot plate - hot plate , tripod stand - tripod stand , wash bottle - wash bottle , dropper (1) - dropper , stop watch - stop watch , p h paper - p h paper , universal indicator paper in packet ( 1 ) - universal indicator paper in packet , mortar pestle - mortar pestle , boiling testube - boiling testube , liquid detergent 500ml - liquid detergent 500ml , bottle cleaner brushes - bottle cleaner brushes , stop clock - stop clock , lead acetate - 500g lr grade , ferric choride - 500g lr grade , copper sulphate - 1000g lr grade , ferrous sulphate - 500g lr grade , ammonium