42 Modern Microscopy 



MICROSCOPES FOR PREPARING AND 

 MOUNTING. 



A plain, substantial microscope-stand, which the user 

 would have no compunction in soiling, is of inestimable 

 value in the preparing and mounting of micro-slides, 

 and a suitable one can be obtained for such a small sum 

 that it is a pity that instruments designed for work of a 

 higher grade should be employed for the purpose. We 

 figure on page 43 an illustration of the type of microscope 

 that will be found very serviceable for this purpose. When 

 we mention that the cost of this is only 20s., that it is pro- 

 vided with rack-work and pinion, and that it has the 

 standard screw for objectives, and receives eyepieces of 

 Continental diameter, it will probably need no further 

 recommendation. 



THE SELECTION OF A MICROSCOPE. 



It will be well to summarize the conclusions arrived at 

 in the consideration that has been given to the individual 

 parts of the microscope in the foregoing pages. 



In the interests of the advancement of microscopy as 

 a science, the best and most suitable means should be 

 commended, and nothing can be said to encourage the 

 perpetuation of such instruments as do not embody the 

 accuracy of adjustment or convenience of design which the 

 modern worker with his beautifully perfect optical acces- 

 sories actually needs in order to derive all the benefit that 

 his lenses are capable of yielding. 



In perusing the catalogues of the Continental makers it 

 is impossible to find amongst them a single instrument 

 which combines all those refinements which the English 

 manufacturer has with such excellent judgment devised 

 and fitted in his. We have had occasion to refer previously 

 to the fact that the Continental sub-stages are provided with 

 no centring screws, the stages, except in two cases,* have 



* Photographic microscopes by C. Zeiss and C. Reichert. 



