III. Rectification of logarithmic errors in the measurements of two sections of the meridional arc of India. In a letter to Professor Stokes, Sec. R. S. By Colonel Everest, F. R. S

It will be in your recollection, that some years ago, at the request of the Court of Directors of the East India Company, I compiled from the General Report of the Great Trigonometrical Survey of India, a work entitled “An Account of the Measurement of two Sections of the Meridional Arc of India,” executed by myself and my assistants, an impression of which (printed in 1847) was presented to the Royal Society. In reference to the work in question, I now have to mention that in the computation of the meridional triangles (vide pp. 240 to 248) there have been some errors committed in taking out the logarithms of the twelfth triangle (p. 241) and the twentieth triangle (p. 243); and as from the nature of that series, the purpose of which is to project the sides of the principal triangles on the meridian, any such error must run through all the computations subsequent to it, I have had the whole series recomputed, and now forward for submission to the Royal Society, a sheet containing a revised synopsis (vide p. 248), such as it would have been, but for the errors adverted to, to which it is my wish that the utmost publicity should be given.