21 



Table of Magnifications of the higher powers of Achromatic 

 Objectives with the Compensating Eye-pieces, 



calcul. for a tube-length of 160 mm (ab. 6 1 /., in.) and an image dist. of 250 mm (ab. 10 in.). 



Table of Magnifications, Free Working Distances and 



Diameters of the Area of Objects embraced by pairs of 



Objectives adjusted for Binocular Microscopes, 



calculated for an image distance of 25O mm (about 10 in.). 



