I shall explain this table by the example of the observation at Greenwich com- 

 pared with the observation at the Cape, which is the first in the table. Thus, 

 9'' SQ'" 50* is the mean of the times of the internal contact observed at the Cape, 

 jh 13m 35s jg ^]^e difference of longitude between Greenwich and the Cape, this 

 being subtracted from the time of the observed contact at the Cape, leaves 

 gh 2,6m 15s for the time the observers at Greenwich should have seen the contact, 

 if there had been no parallax of Venus; subtracting therefore the time of the 

 observed contact at Greenwich from this time, the remainder 7"" 15' is the effect 

 of the parallaxes of longitude and latitude at the two places of observation. But 

 the effect of these two parallaxes at the Cape, on the supposition of the sun's 

 parallax being = S^, is = 6"^ 8% by which quantity of time the observers at 

 the Cape should have seen the internal contact later than at the centre of the 

 earth; and the effect of the same parallaxes at Greenwich is = 1™ IP, by which 

 quantity of time the observers at Greenwich should have seen the internal con- 

 scope of Mr. Dolland's construction, which was not well fitted up; it may therefore be presumed 

 that there is some mistake in the observation of M. Maraldi, because his observation is later than that 

 of M. de la Caille, and differs so considerably from the rest. — Orig. 



