BAROMETER FORTINS

For school/college laboratories.Nominal6mm bore glass tube.With engine divided dual scales 675 to 820×1

mm Hg and 26.5 to 32.5×0.05 inch Hg.Verniers reading 0.05 mm and 0.002 inch.Mounted on polished wooden

board for wall mounting.Supplied without mercury but with instructions for filling