CHAPTEE VI. 

 CONCLTIDING EEMAEKS. 



As we have dealt with many micro-objects in the fore- 

 going chapters, a few details concerning the microscope 

 and its accessories may be interesting and useful to those 

 who may wish to study in a practical manner the various 

 objects mentioned in this book. 



The Microscope. — I^or the investigation of parasitic 

 fungi and farm insects a good microscope is essential ; and 

 there are several manufacturers in England and on the 

 Continent who make instruments that are well adapted 

 for such work. The microscopes of Carl Zeiss, of Jena 

 (whose instruments are sold by C. Baker, of 243, Holborn, 

 London), are strongly recommended for students and others 

 who are desirous of purchasing first-class instruments. 

 Zeiss's large microscopes are suitable for the complete 

 investigation of all the organisms mentioned in the fore- 

 going pages. Messrs. Beck, of 68, Cornhill, London, and 

 Messrs. Powell and Lealand, of 170, Euston Road, 

 London, are also manufacturers of good microscopes. A 

 suitable cheap microscope is made by Zeiss at about £3. 

 All the higher objectives are available with this instru- 

 ment (No. vii.), on account of the fine quality of the 

 micrometer movement. Beck's " star " microscope is also 

 a good cheap instrument. 



The Objective is the most important part of the 



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