The vse of the two mathematicall instruments : the crosse staffe, (differing from that in common vse with the mariners:) and the Iacobs staffe: set foorth dialogue wise in two briefe and plaine treatises: the one most commodious for the mariner, and all such as are to deale in astronomicall matters: the other, profitable for the surueyor, to take the length, height, depth, or breadth, of any thing measurable. Set forth by Th. Hood. mathematicall lecturer in the citie of London. The staues are to be sold in Marke lane, at the house of Francis Cooke.