Chaucer's Works, Volume 3 — The House of Fame; The Legend of Good Women; The Treatise on the Astrolabe; The Sources of the Canterbury Tales

by Geoffrey Chaucer

Fig. 18. Use of the Umbra Recta, at two observations; Astrol. ii. 43 and 43a.

FIG. 1. BACK OF THE 'ASTROLABE.'

FIG. 2. FRONT OF THE 'ASTROLABE.'

FIG. 3. LABEL. FIG. 4. PIN. FIG. 5. PLATE FOR A CLIMATE. FIG. 6. RULE.

FIG. 7. WEDGE AND HORSE (from a MS.).

FIG. 8. DIAGRAM FOR A PROPOSITION. FIG. 9. STAR-POINTS.