Mr. Charles Green, formerly Assistant of the Royal Observatory at Greenwich, and Lieut. James Cook,* of His Majesty's Ship the Endeavour

“ I judged that the penumnbra was in contact with the sun's limb 10s sooner than the time set down above; in like manner at the egress the thread of light was not broke off or diminished at once, but gradually, with the same uncertainty; the time noted was when the thread of light was wholly broke by the penumbra. At the total egress I found it difficult to distinguish Venus's limb from the penumbra, which of course made the second external contact a little doubtful, and the precise time that the penumbra left the sun could not be observed to any great degree of certainty, at least by me. ”

“ Remark.--It must be confessed, that the results of these observations (most of which were made by Mr. Green) differ more from one another than they ought to do, or than those do made by other observers, with quadrants of the same size, and made by the same artist, the cause of which, if not owing to want of care and address in the observer, I don't know how to assign. ”

“ Some of the other gentlemen, who were sent to observe at different places, saw at the ingress and egress the same phenomenon as we did; though much less distinct, which no doubt was owing to their telescopes being of a less magnifying power; for the penumbra was visible through my telescope during the whole transit; and Dr. Solander, whose telescope magnified more than ours, saw it, I have reason to think, distincter than either Mr. Green or myself ”