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USE OF TABLE I. 



Example. 



The English Barometer reads 20.657 inches. What would be the corresponding 

 height in the Metrical Barometer } 



In Table I., first column on the left, look out the line of 20 inches 6 tenths ; on 

 that line, in the sixth column, headed 5 hundredths, is found the value in milli- 

 metres for 



20.65 inches = 524.50 millim.etres. 

 At the bottom of the page, for 0.007 " = 0.18 " 



Or for 20.657 " = 524.68 " 



which would be the reading of the Metrical Barometer. 



This example may serve for all tables, throughout the volume, which are constructed 

 on the same plan. 



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