Burner Bunsen-Simple Glassware_Glass Flasks this resistance box at plus-or-minus

this resistance box at plus-or-minus 1% on each step replaces dozens of fixed resistors at the bench

sized for bigger submerged specimens in volume-by-displacement and specific-gravity work

Mounted plant cell model exposes cell wall

Fifty-turn 4A coil for the demountable transformer

4A standard rheostat with constantan winding on a vitreous-enameled steel tube

Burner Bunsen-Simple Glassware_Glass Flasks this resistance box at plus-or-minusNickel plated burner tube with rotatable air regulator, mounted on casted base. Nickel plated burner tube with rotatable air regulator & cylindrical riffled connector, mounted on casted base. Burner tube 11 mm dia., base dia. 65 mm, overall height 130 mm. Connector 10 mm o. d. For use with LPG Butane gas.