REFRACTION. 



Table II. Of Correaion-! to the preceding Table of Refraclions for diflerent Degrees of Temperature. An Increafe of 

 Coid augments Refriiftion ; tlicrefore, the Corredtion is Additive for a Temperature Mi than 14^ of the Centigradi-, 

 and Siibtradive for tliofe above it. 



Table III. Of Correftions to the Table of 

 Atmofpheric Preflure augments Refraftion ; 

 Inches, but Subtraftive when lefs. 



Rcfraftions relative to the Weight of the Atmofphere. An Increafe of 

 the Correction is Additive when the Barometer is more than 29.922 



To 



