Consisting of Original Communications, Specifications of Patent Inventions, Practical and Interesting Papers, Selected from the ... R. S. Edbi. With an Engraving. From the Edinburgh Philosophical Journal. J. HE only improvements on the reflecting telescope which ... and placing it half-way between the large speculum and its principal focus ; it intercepted the cones of rays at the middle of their axis, andanbsp;...
|Title||:||The Repertory of Arts, Manufactures, and Agriculture|