The Artisan, or, Mechanic's instructor : containing a popular, comprehensive and systematic view of the following sciences ... also biographical notices of eminent scientific men, enriched by portraits : with many interesting and valuable articles relating to the mechanical and useful arts : the whole intended as a companion to the institutes (1825)
Carey, George G · London : Printed for William Cole · leaf 52
THE ARTISAN. verted image of the flame of the candle, ing through the glass, that they will go out which may be seen on a paper placed of it parallel to each other; as represented where the rays meet. in the following figure. Hence, if any object A B C be "placed … some of the rays which flow from every Here the rays dl, eH, /h, which pro- point of the object, on the side next the ceed from the point c, go out of the gla=s glass, will fall upon it, and after passing parallel to each other ; the rays d G, cK, through it, they will be converged into as /D,…
