I. -II. 



COMPARISON 



OP 



THE ENGLISH BAROMETER 



THE METRICAL AND THE OLD FRENCH BAROMETERS, 



OR 



TABLES 







FOR CONVERTING ENGLISH INCHES INTO MILLIMETRES, AND INTO FRENCH OR 

 PARIS LINES AND DECIMALS ; 



GIVING THE VALUES CORRESPONDING TO EVERY TENTH OF AN INCH, FROM 9 



TO 19 INCHES ; AND TO EVERY HUNDREDTH, FROM 



19 TO 31.5 ENGLISH INCHES. 



