247 



VII. -VIII. 

 COMPARISON 



OF 



THE RUSSIAN BAROMETER 



THE METRICAL AND THE OLD FRENCH BAROMETERS, 



OR 



TABLES 



FOR CONVERTING RUSSIAN HALF-LINES INTO MILLIMETRES, 

 AND INTO FRENCH OR PARIS LINES ; 



GIVING THE VALUES CORRESPONDING TO EVERY HALF-LINE FROM 440 TO 540, 



OR FROM 22 TO 27 INCHES ; AND TO EVERY TENTH, FROM 540 TO 610 



HALF-LINES, OR FROM 27 TO 30.5 ENGLISH INCHES. 



43 



