56 - Dr. Holyoke’s new scale Sc. 
never, but on such occasions as require very great accuracy, to need 
any subdivision, or the use of fractional parts. The notation will be 
as sitiple and convenient, as the nature of things will admit, and. al- 
ways direct and affirmative ; and cannot in any case call for the use of 
either the negative or positive sign; and is therefore less apt to lead 
-jnté any értor. So that it is hoped the proposed scale is free from all 
the objections, to which those now in use are peace and i is more nat- 
ural and philosophical. 
To reduce a given degree of Fahrenheit’s scale to oi liveeresaiine: 
ing degree in the preposed scale, 
Add 40 to the given degree, multiply that sum by 100, and divide 
the product by 72. The quotient will be the corresponding degree 
by o our scale, if the riven a of Fahrenheit be above 0. But if 
the given degree be below 0, or have the pealve | sign, then subtract 
the given degree from 40, and proceed as above. 
_To reduce a given degree of the proposed scale to its corespond , 
ing degree of Fahrenheit, 
Multiply the given degree by 72, divide the product by 100, aid 
subtract 40 from the quotient, the remainder is the degree of Fahren- 
heit sought, to which the positive sign must be prefixed. But if the 
quotient | be less than 40, then subtract it from 40, the remainder is the. 
degree in whole numbers ; but if there be a fraction remaining in the » 
division, that must be subtracted from the quotient, and the remainder — 
will be correctly, the degree sought; to which the negative sign must 
be prefixed. 
_ But the readiest and most convenient mode of comparing any two 
or more thermometers is by a juxtaposition of their scales.* ; 
<cceeabvtanint semen gs has made some 
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