ASTRONOMICAL LABOURS OF JAVASINHA* 20? 



firft argument in the fir ft or fourth quarter* it is fub- 

 tra&ive ; and in the fecund or third quarter, it is ad- 

 ditive. • 



9. The moon's third equation, has alfo two argu- 

 ments ; 



1. From the moon's piace, corrected by the fecond 

 equation, fubtract the fun's true longitude ; the figns 

 and degrees of this are at the top and bottom of the 

 table. 



2. The moon's mean anomaly, corrected by the 

 fecond equation ; the figns and degrees are on the 

 right and left of the table. 



The equation is found at the interfeclion of the 

 arguments ; and is to be applied to the moon's longi- 

 tude twice equated, by addition or fubtraction, as ex- 

 preffed in the table, to give her true place in thsfekk- 

 mayee or in her orbit. 



10. Equation of the node. 



Argument, the moon's longitude thrice equated, 

 diminifhed by that of the fun. The equation is to be 

 added to, or fubtradted from, the place of the node, as 

 expreiled in the table. 



In the lame table is a fecond column, entitled cor- 

 reclion of the node. The numbers from this is to be 

 referred and applied farther on. 



11. The moon's fourth equation, or reduction from 

 her orbit, to the ecliptic. From the moon's longitude 

 thrice equated, fubtracl the equated longitude of the 

 node, the remainder is the argument of latitude and 

 this is alio the argument of the fourth equation ; 

 which is to be fubtracled, if the argument is in the firft 

 or third quarter, from the moon's place in her orbit ; 

 and if the argument is in the fecond or fourth quarter, 

 added to the fame to give her longitude in the nucmujftl, 

 i. e. reduced to the ecliptic. 



12. Table of the moon's latitude, contains two co- 

 lumns, latitude and adjujhnent of the latitude. Both of 

 thefe are to be taken out by the figns and degrees of 

 the argument of latitude. 



N 4 Multiply 



