Ditto ditto arranged for observations being taken by the Cathetometer 18 18 0 =Cathetometer=, for use with above 21 0 0 9 =Self Compensating Standard Barometer=, Fig. 6 20 0 0 10 =Standard Barometer=, with electrical adjustment 15 15 0 11 =Pediment Barometers=, Fig 7 L1 1 0 2 2 0 Ditto ditto Fig. 8 L3 3 0 3 10 0 Ditto ditto Fig. 9 L4 10 0 5 10 0 Ditto ditto Fig. 10 8 10 0 Ditto ditto ditto handsome carved mountings, in mahogany, oak, or walnut wood L8 8 0 L10 10 0 12 12 0 14 =FitzRoy's Storm or Sea Coast Fishery Barometer=, Fig. 12 5 5 0 Ditto ditto with two verniers 6 6 0 Ditto ditto mounted in ornamental carved frames, oak, walnut, or mahogany L6 10 0 8 8 0 19 =Marine Barometers=, ordinary forms, Figs. 13 and 14 L2 2s. L2 10s. 3 3 0 Ditto ditto Best mounted L5 5s. 6 6 0 20 =The Board of Trade or Kew Marine Barometer=, Fig. 15, L4 4s. L5 5s. 6 6 0 22 =Negretti and Zambra's FitzRoy Marine or Gun Barometer=, Fig. 16, with N. and Z.'s Patent Porcelain Scales, as used in Her Majesty's Navy 5 10 0 Extra Tube for ditto 1 15 0 25 =Negretti and Zambra's Farmer's Barometer or Domestic Weather Glass=, Fig. 17 2 10 0 28 =Negretti and Zambra's Miner's Barometers= L1 1s. L2 2s. 3 3 0 31 =Dial or Wheel Barometers=, Figs. 18, 19, 20, 21 L3 3s. L4 4s. 5 5 0 Ditto ditto in carved ornamental mountings L5 10s. L6 6s. L8 8s. 10 10 0 Ditto ditto rosewood, inlaid with pearl or metal. Made to order, Figs. 22 and 23. Price varying with size, &c. 37 =Gay Lussac's Syphon Tube Mountain Barometer= L6 6 0 8 8 0 32 =Standard Syphon Barometer=, Gay Lussac's arrangement, Fig. 24 5 5 0 38 =Negretti and Zambra's Standard Mountain Barometer=, with Fortin's cistern, with tripod stand and travelling case, Fig. 30 10 10 0 34 =Barograph, or Self-registering Barometer=, with syphon mercurial tube. Negretti and Zambra's improved arrangement, Fig. 26 18 18 0 25 0 0