ASTRONOMICAL LABOURS OF JAYASIXHA. 



135 



JLt?itc?\ the femidiameter 

 of which is of eighteen 



cubits, and one minute 

 on it is a barley-corn 

 and a half; of Hone and 

 lime, of perfect liabili- 

 ty, with attention to the 

 rules of geometry, and 

 adjuftment to the meri- 

 dian, and to the latitude 

 of the place, and with 

 care in the mealuring 

 and fixing of them ; lo 

 that the inaccuracies 

 from the fhaking of the 

 circles, and the wear- 

 ing of their axes, and 

 diiplacement of their 

 centres, and the inequa- 

 lity of the minutes, 

 might be corrected. 



' Thus an accurate 

 method of conitrudlins: 

 an obfervatory was efta- 

 blifhed ; and the dif- 

 ference which had ex- 

 ifted between the com- 

 puted and obferved 

 places of the fixed liars 

 and planets, bv means 

 of obierving their mean 

 motions and aberrations 

 with fuch infh'uments, 

 was removed. And, in 

 order to confirm the 

 truth of thefe obierva- 

 tions, he conftrucled 

 i n ft rumen ts of the fame 

 kind \\\ Sui'a'i Jeypoor^ 

 and Matrj, and Btmares, 

 and Oujei?i.—-'XV hen he 

 compared thefe obier- 



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