Trade centres at Ts'ingtao, a town within the bay.
This angle, therefore, divided by the magnifying power of the telescope gives the real angular distance of the centres of a double star.
The distance between the centres of the two spectrographs shall be equal to the distance between the optical axes of the two viewing microscopes.
Pietro, forms a more or less protected basin, upon the shores of which are several small harbours (the most important being Carloforte), which are centres of the export of minerals and of the tunny fishery.
They possessed in Cyprus a kingdom, in which they had vindicated for themselves a stronger hold over their feudatories than the kings of Jerusalem had ever enjoyed, and in which trading centres like Famagusta flourished vigorously.