724 THE RAMSDEN DIVIDING ENGINE. 



Tiie numbers of the tablet are as follows : 



[Tlio word •' degrees " is usod to ri'preawit the units of the division of 480.) 



* The sixteenth day, for 224° of advance, ii becomes obscure and retrogrades, 

 t The thirtieth day the moon is the god Auu. 



S. 162. 

 OBVERSE 



Fig. 1.— Babylonian Planisi'ueke. 

 FRAGMENT OF PLANISPHERE IN THE BRITISH MUSEUM. 



Figure 1 represents a small fraj^ment of a i)lanisphere in the British 

 Museum (S. IG'J). It contains two compartments, each of which is char- 



