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Received December 12, 17^5. 
XXXIV. On the Tranjit of Venus in 1769. 
To the Right Honourable 
The Earl of Morton, Prefident, 
To the COUNCIL and FELLOWS 
Of the ROYAL SOCIETY, 
This Discourse is, with all Humility, inferibed. 
By their humble Servant, 
Thomas Hornfby. 
66^’ obfervations of the late Tranfit 
‘ J, of Venus, though made with all 
polhble care and accuracy, have not enabled us to 
determine with certainty the real quantity of the fun’s 
parallax j (ince, by a comparifon of the obfervations 
made in feveral parts of the globe, the fun’s parallax 
not lefs than nor does it feem to exceed i o". 
From the labours of thofe gentlemen, who have 
I attempted 
