= 69 



The apparatus can also be used for drawing on a reduced scale by placing 

 the object upon the drawing-board and the paper upon the wooden plate of the 

 stage. 



Objective a* with variable initial magnification is the most suitable lens 

 for drawing with the microscope although other objectives of low and medium 

 power, to perhaps C, may still be used with a fair degree of convenience. The 

 combination of a* with HuYGENIAN oculars Nos. 1 5 results in almost any 

 desired magnification, ranging between X 2.25 and X 23, being obtained, while 

 the diameter of the visual field varies between about 6 and 45 mm ( l l t and ! 3 / 4 in.). 

 Spectacle-lenses of from 1 to 5 diopters yield magnifications from 1.25 to 2.25 

 diameters. For details in construction we must refer to: M. BERGER, Zeitschr. f. 

 Instrkde. XXI, 1901, pp. 171175. 



1=11=1 



Cabinets for the Stands. 



The cabinets and cases for the storage and transport of the stands are reduced 

 as much as possible for the sake of compactness, yet sufficient room is provided 

 for the entire instrument with its objectives (even when attached to revolving 

 nose-pieces or sliding changers) and inserted ocular, and for a sufficient number 

 of objectives, oculars and some few accessory appliances. (See Fig. 45, p. 96.) 



The price of the cabinet or case is always included in that of 

 the stand. 



Leather travelling-cases for the protection of the cabinets are regularly 

 manufactured by us in two various sizes. 



Marks Codeword 



Leather travelling-cases for cabinets of Stands I, III, IV ... 36. Patrissabo 



Stand VI 8 38. Patrizzavi 



If desired, the owner's name may be engraved upon the base of the stand. 

 Charge for engraving name on stand: Marks 3. . (Code-word: Patriota.) 



Mckelled name plates for the mahogany cabinets are also supplied. Price 

 of nickelled plate, including engraving of name: Marks 5. . (Codewyd: Patricio.) 



