the Confiruttion of the Heavens. ASE 
than 30 degrees of a great circle, and found tt almoft every 
where equally rich in fine nebula, it till might be dangerous 
to proceed in more extenfive conjectures, that have as yet no 
more than a precarious foundation. I fhall therefore wait till the 
obfervations in which I am at prefent engaged fhall furnifh me 
with proper materials for the difquifition of fo new a fubject. 
And though my fingle endeavours fhould not fucceed in a 
work that feems to require the joint effort of every aftronomer, 
yet fo much we may venture to hope, that, by applying our- 
felves with all our powers to the improvement of telefcopes, 
which I look upon as yet in their infant ftate, and turning 
them with affiduity to the ftudy of the heavens, we fhall in 
time obtain fome faint knowledge of, and perhaps be able 
partly to delineate, the Interior Confiruction of the Univer fee 
Datchet near Windfor, 
April, 1784. ‘WILLIAM HERSCHEL, 

Vox. LXXIV, Nna 
