THE LATE PETER EWART, ESQ. 129 
“'This information has been of very great 
value to me, as well as to many others to whom 
I have communicated it. 
‘‘ This fact has since been also found out by 
others; and I see a paper has been read on the 
subject before the society of civil engineers, 
though known to me through Mr. Ewart up- 
wards of twenty years ago. 
“JT regret I cannot call to mind at present 
various other valuable information which I have 
from time to time received from him.” 
“Tam, Dear Sir, 
“ Very respectfully, 
‘‘ Your most obdt. 
“JESSE HARTLEY.” 
“Dr. Henry, Haffield, Ledbury.” 
In the physical sciences Mr. Ewart’s knowledge 
was at once exact and comprehensive. He had 
naturally selected as the prominent object: of 
study, from its close affinity with his professional 
pursuits, Theoretical Mechanics. Without having 
aspired to the mastery of the higher Calculus, 
either in its original English form, or ‘in the 
more refined developement and vastly augmented 
