Tractatus de Globis et Eorum Usu.

Robert Hues (1553-1632) was an English mathematician and geographer. During a trip to Newfoundland, he made observations which caused him to doubt the accepted published values for variations of the compass. Between 1586 and 1588, Hues travelled with Thomas Cavendish on a circumnavigation of the globe, performing astronomical observations and taking the latitudes of places they visited. Beginning in August 1591, Hues and Cavendish again set out on another circumnavigation of the globe. During the voyage, Hues made astronomical observations in the South Atlantic, and continued his observations of the variation of the compass at various latitudes and at the Equator.

In 1594, Hues published his discoveries in the Latin work Tractatus de globis et eorum usu (Treatise on Globes and Their Use) which was written to explain the use of the terrestrial and celestial globes that had been made and published by Emery Molyneux in late 1592 or early 1593, and to encourage English sailors to use practical astronomical navigation. Hues' work subsequently went into at least 12 other printings in Dutch, English, French and Latin. This is the English translation by John Chilmead (1638).

Hakluyt Society First Series, LXXIXa and LXXIXb; 8vo (22.5 x 15 cm); frontispiece, folding colour lithograph map by F.S. Weller after E.A. Reeves, discreet bookbinders ticket to rear pastedown, mostly unopened; original publisher's gilt blue cloth, spine a little faded, a very good copy; lviii, [2], 229; [4], 37, [1]pp.