279 



XIX. 



METRICAL B A R O xM E T E R , 



TABLE 



FOR 



REDUCING TO THE FREEZING POINT THE PVROMETRICAl 



COLUMN, 



measured by brass scales, extending from the cistebn to 



the top ; calculated from 260 to 865 millimetres, 



and for each degree centigrade. 



By M. T. Delcros. 



73' 



