Proceedings of the Royal Society for July, 1867

The monthly evening meeting of the Fellows was held at the Musenm on Tuesday, the 9th July, His Excellency Colonel Gore Browne, President, in the chair.
Mr. Abbott read some "Notes on the simultaneous disappearance of Jupiter's four satellites" on the 22nd and 2oth August.
after the paper discussion ensued, chiefly in reference to the expeditions contemplated to our hemisphere, for the very important purpose of observing the transits of Venus in 1874 and 1882, and so determining, amongst other matters, the exact distance of the sun from the earth, and other questions depending upon it.