CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 



65 



No. 908. 



895. 



896. 

 898. 



899. 



900. 

 908. 



909. 

 917. 

 918. 



920. 

 922. 

 924. 



926. 

 928. 



930. 

 932. 

 934. 



BAROMETER, Standard Mercurial, United States Weather Bureau Typ. Same as No. 894, but 

 without the board back $57.50 



BACK only of No. 894 Standard Barometer 7.50 



BAROMETER, Standard Mercurial, United States Weather Bureau Type. Same as No. 894, but 

 with a scale reading down to 20 in. for use in altitudes up to 10,000 feet 68.00 



BAROMETER, Standard Mercurial, United. States Weather Bureau Type. Same as Xo. 898, but 

 without board back 60.00 



BACK only of Xo. 898 Standard Barometer, described under No. 894 8.00 



BAROMETER, Recording (Barograph). Made in America. The movement is concealed in the 

 base of the instrument and is worked by a large vacuum pan. In mahogany case, glass top 

 and sides, and storage space for charts. Special charts, with instructions for weather fore- 

 casting are supplied. Complete with full directions for use, charts for a year, pen and ink. 

 55.00 



BAROGRAPH CHARTS, for No. 908 Barograph. In boxes containing one year 's supply. 



Per box 2.50 



BAROGRAPH CHARTS, Style No. 2, for old style imported barographs reading 28 to 31 inches. 

 In boxes containing one year's supply Per box 2.25 



BAROGRAPH CHARTS, Unfigured, but graduated for a 3 inch range. For old style imported 

 barographs. In boxes containing one year's supply Per box 2.25 



INK, purple, for Barographs and Thermographs Per bottle .50 



BAROMETER TUBE, unfilled, large bore, thick wall, one end sealed. Length, 80 cm .37 



BAROMETER TUBE, unfilled, same as No. 922, with glass mercury well and pipette for filling 

 55 



BAROMETER TUBE, unfilled, same as No. 922, but graduated in millimeters 2.50 



BAROMETER TUBE, Demonstration Form, unfilled, with funnel top and with stopcock at top 

 and bottom for easy filling and emptying of the tube. Total length, 104 cm. Graduated from 

 100 to 780 mm in millimeter divisions 8.00 



MERCURY WELL, japanned iron. Capacity about 50 cc 40 



BAROMETER TUBE, Siphon Type, unfilled, with bulb on short arm. Length, 80 cm 75 



BAROMETER TUBE, Siphon Type, Bunsen's, unfilled. Graduated at the top of each arm in 

 millimeter divisions 4.00 



