( 10 ) 



V. Table of Magnifying Powers. 



Ti -A ell and L<>alacd's Xo. 2 = 7 ■•4, and B«-ck's No. 2 uh] Boss's B = S magnifyisg ; 

 resucciivcly j\ k«s and jJj more than the SgUT«» given in this cvluiun. "^ 



