380 SEC. 11. ASTRONOMY. 



t Tab. I. Adjustable universal calendar key, 



Tab. II. Adjustable annual calendar. 



Tab. III. Adjustable astronomical calendar of the northern zone. 



Tab. IV. Table for discovery of the theoretical epacts. 



Tab. V. Table for finding the epacts to be applied. 



Tab. VI. to VIII. contain : explanations and examples of the Calend. 

 Perp. Mob. ; adjustable universal calendar ; adjustable indicator of dates ; 

 adjustable cylindrical indicator of week days ; adjustable perpetual pocket 

 calendar; annual pocket calendar for the year 1877; calend of the week 

 days. 



1924d. Reproduction of the Books on Astronomy, 



written by Dr. Alonso el Sabio, 13th century, from the original 

 MS. at the Escorial. Academia de Cicncias, Madrid. 



"Libros del Saber de astronsmia del Key Don Alonso el Sabio" 5 vol., gr. 

 in fol., Madrid. 



These volumes contain an extensive account of astronomical science in the 

 13th century, the plates reproduce among other details the constellations there 

 known, and the astronomical instruments used at. the time. 



1924e. A reproduction in plaster of a fragment of the 

 Zodiac (Aries). The original, in stone, is at the Archaeological 

 Museum at Madrid. Archceological Museum, Madrid. 



This was found, with other objects of a very remarkable kind, at Yecla, in 

 the province of Alicante (Spain). It has an inscription in old Greek cha- 

 racters relating to the subject. 



