XX. 



METRICAL BAROMETER. 



TABLE 



FOR 



REDUCING TO THE FREEZING POINT THE BAROMETRICAL 



COLUMN, 



MEASURED BY BRASS SCALES, EXTENDING FROM THE CISTERN TO THE TOP ; CAL- 



CULATED FOR THE HEIGHTS BETWEEN 605 AND 800 MILLIMETRES, AND FOR 



EVERY TENTH OF A DEGREE, FROM TO + AND - 35 CENTIGRADE. 



BY M. T. HAEGHENS. 



79 



