the Divisions of astronomical Instruments. 245 
the French method can never be applied to the azimuth circle, 
nor to any other circle which does not turn both upon its own 
axis, and upon one which is perpendicular to it. 
After all, however, it is possible that the process which I 
have been explaining to you may be no new discovery, and 
that you may be already acquainted with it. If this should be 
the case, you will be kind enough to inform me. At any rate, 
indeed, I should esteem myself greatly obliged, if you would 
favour me with your sentiments upon the subject, as soon as 
you can do it with perfect convenience to yourself. 
I am, Dear Sir, 
yours, &c. 
WILLIAM LAX, 
MDCCCIX. 
Kk 
