Calcutta , Madras, and Bombay, in the East Indies. 411 
ences, applied to the longitude, found by the Tables in the 
Ephemeris were obtained by eclipses taken at Greenwich, as 
near the time as possible that each eclipse was observed at 
Madras. 
The following are the observations and results. It may 
be proper to state, that some additional observations were at 
first included in these Tables ; that a mean was taken ; and, 
when any longitude differed more than 30 seconds from the 
mean, it was rejected ; and it is only these eclipses which 
were within 30 seconds of the general mean that are here 
included. The observations being so numerous, enabled me 
to make this selection. The general result in both cases is 
however very nearly the same, as is commonly the case ; 
there being found as many rejected observations giving a 
longitude too great as too little.* 
* In finding the difference of the Tables, reference has been made to the circum- 
stance under which the Greenwich observation nearest the time was taken, and its 
value in consequence ; as well as to other observations taken about the time. 
