THE RAMSDEN DIVIDINa ENGINE. 



725 



acterized bj' tho uanie of a month. The month Marchesvau is the 

 eighth and Oislev the ninth. Tho arcs have at their left-hand corners 

 the numbers shown. (This is a "sky aspect." A "globe aspect" would 

 be the reverse.) 



"This remarkable fragment is sufficient to determine the following- 

 table, in which the year is supposed to be divided into 12 mean months: 



"To compare the longitudes of the planisphere with our own we have 

 the following table, taking the numbers of the inner circle, /. e., the 

 division of 120: 



Kame of month. 



No. of 

 month. 



Dejjvees. 

 Longitude from 

 Degrees. | same zero with 



360°, reckoned pos- 

 itively. 



Nisan 



lyyar 



Sivan 



Taramuz . . . 



Al. 



Elul 



Tisri 



Marches van 



Cislev 



Tebet 



Sebat 



Adar 



20 

 10 

 120 

 110 

 100 

 90 

 80 

 70 

 CO 

 50 

 40 

 .'iO 

 20 



300 



330 



360 



30 



CO 

 00 

 120 

 150 

 180 

 210 

 240 

 270 

 300 



