Table of Magnifications of the Achromatic Objectives 

 with HUYOENIAN Oculars, 



calculated for a tube-length of 160 mm (about Q 1 / 2 in.) and an image distance 



of 250 mm (about 10 in.) 



In employing nose-piece or sliding objective-changer, the length of the nose-piece amounting to 

 15 mm, that of the sliding objective-changer to 22 mm, must be taken into account (see p. 8). 



(Bail 



