§ 39. Though MS. A is rather corrupt here, there is little doubt about the corrections to be made. See the Critical Notes, p. 237. 19. That is, the latitude, or breadth, of a climate, or belt, is measured along a line which goes from North to South as far as the earth extends; so that the latitude of the _first_ climate, for example, is measured from the beginning of it to the end of the same, in a due northerly direction. Other authors, he explains, reckoned the latitude of a climate always from the equinoxial line, instead of from the parallel of latitude which terminated the climate immediately to the south of it. Thus the latitude of the fourth climate might mean, either the breadth of that belt _itself_, or the _whole_ breadth from the equator to the Northern limit of that climate. The MS. E. 2 in St. John's College, Cambridge, contains (besides Chaucer's 'Astrolabe') a Latin treatise entitled 'De septe_m_ climatib_us_ expositio.' We find mention of the 'climates' also in MS. Camb. Ii. 3. 3, fol. 33 _b_, where a diagram appears representing a hemisphere, divided by parallels of latitude into 9 climates or belts, which, beginning from the equator, are as follows. 1. Inhabitabile propter Calorem. 2. Primum clima dia Meroes. 3. Secundum clima dya cienes. 4. Tertium clima di' alexandrios. 5. Quartum clima dia rodos. 6. Quintum clima dia romes. 7. Sextum clima dia boristenes. 8. Septimum clima dia rifeos. 9. Inhabitabile. This agrees with the list in the footnote on p. 221. There is a passage in Mandeville which well illustrates Chaucer; I quote the part of it which more immediately relates to the Climates. 'For the Superficialtee of the Erthe is departed in 7 parties, for the 7 Planetes; and the parties ben clept Clymates. And oure parties be not of the 7 Clymates: for they ben descendynge toward the West. And also these yles of Ynde, which beth evene a[gh]enst us, beth noght reckned in the Climates: for thei ben a[gh]enst us, that ben in the lowe Contree. And the 7 Clymates strecchen hem, envyrounynge the World,' &c. Mandeville's Voiage, ed. Halliwell, p. 186. See also Ptolemy's Almagest, lib. ii. As regards the longitudes of towns, it may be observed that in MS. F. 25 in St. John's College, Cambridge, the longitudes of Rome, Cordova, London, Paris, and Malta, are said to be 34° 24', 9° 30', 19°, 20°, and 38° respectively. These do not well agree together, but they suggest a reckoning from a meridian situated some 20° W. from that of Greenwich. Chaucer says nothing as to what meridian was used for reckoning longitudes from; and Messahala says, vaguely enough, that longitudes were reckoned 'a meridiano circulo ultime regionis habitabilis in occidente,' i.e. from the most westward habitable place, which possibly once meant Madeira.