Page:History of the Royal Society.djvu/179

Rh, and Morocco, for Spain, and Portugal, for Turky, for France, for Italy, for Germany, for Hungary, for Transylvania, for Poland, and Sweden, for Iceland, and Greenland, they have given Directions for Seamen in general, and for observing the Eclipses of the Moon; for observing the Eclipses of the Sun by Mercury, in several Parts of the World, and for observing the Satellites of Jupiter.

Of this their Way of Inquiry, and giving Rules for Direction, I will here produce a few Instances; from whose Exactness it may be guessed, how all the rest are performed.

Rh