f/ * 
PHILOSOPHICAL 
- v 
TRANSACTIONS. 
/ 
XVII. 'Theorems for computing Logarithms. By the Rev. 
John Hellins; communicated by the itey.Nevil Malke- 
Jyne, D. D. F. R. S. and AJlronomer Royal. 
Read March i6 ? 1780. 
fnr"'HE utility of logarithms is fo well known, that 
much need not be faid upon it. In our days he 
muft be a flender mathematician who does not know 
4 
that they are ufeful, not only in trigonometry, naviga- 
tion, aftronomy, the calculations of compound intereft 
Vol. LXX. T t a*d 
