228 The Rev. Samuel Haughton's Account of Experiments made 



Table (2). — Calcolated Results. 



In this Table v is calculated by the formula 



the other quantities are deduced in the same manner as in the other experiments. 

 Having obtained the results calculated from the foregoing series of experi- 

 ments, I had recourse to equation (4), 



—y- — A + K sec I —r- , 

 vs . vs 



•which contains two unknown quantities, A and K sec i. Having found ap- 

 proximate value3 of these quantities in each of the four series of experiments, 

 I then by trial of successive numbers extending to the fourth decimal place, 

 obtained finally the following results, which give the values of K sec i and A 

 wliich best satisfy all the experiments. 



First Series. 



Rejecting the second experiment, which is manifestly erroneous. 



