a) Fortin’s Barometer (CODE SI-1) :- Entire Construction of metal. The metric and English system scales read from 25” to 32” and 64 to 81 cms respectively with reflector behind scale and cistern The Vernier is worked by a milled head of the side operating with rack and pinion and reads 0.1” 0.1 cm Mounted on wood with Aluminium pipes and Aluminium fitting with soda glass tube but w/o thermometer. b) Fortin’s Barometer (CODE SI-2) :- Same as above. But with iron pipe and aluminium fitting but w/o thermometer. c) Fortin’s Barometer : (CODE SI-3) :- Same as above. But with Brass pipe and fittings. Complete set w/o thermometer. d) Fortin’s Barometer (CODE SI-4) :- With brass pipe, brass fitting with corning glass tube and fitted with metal enclosed Thermometer extra superior quality with accurate scale reading etc. e) Fortin’s Barometer Case :- Made of teak wood with glass on three sides. f) Fortin’s Barometer Case :- Made of haldu wood.