PRACTICAL WORK. 331 



suited j 1 but it is best to have some practical lessons 

 from the dealer you buy it of, or the friend you borrow 

 it from. Information as to where a good microscope 

 may be bought is given below. 



Microscope preparations may be bought of many 

 different dealers, from whom almost any desired object 

 may be obtained. But many mounted objects are of 

 very little value, being prepared merely with a view 

 to looking pretty, while all the essential parts are 

 destroyed, or so altered by reagents that they are not 

 in the least like what they were in the fresh state. 

 This does not apply, however, by any means to all. 



The following is a list of some of the iirms from 

 which microscope preparations may be obtained : — 



Aylward, 164, Oxford Road, Manchester. 

 Baker, 24i, High Holborn, London. 



Bnock, 11, Parolles Road, Miranda Road, London, N. (For 

 insects especially.) 

 Hinton, 12, Yorley.Road, Upper Holloway, London, N. 

 Hume, 1, Lothian Street, Edinburgh. 

 Medical Supply Association, 12, Teviot Place, Edinburgh. 



' One or both of the volumes named in the list of books 

 that has been already given (Nos. 1 and 10) may be used as a 

 guide in practical work. 



Appendix in Huiley & Martin's Elementary Biology. See 

 also En'cycl. Brit., art. "Microscope," by W. B. Carpenter. 

 Among older books, Dr. Carpenter's Mierosaojpe and its Beua- 

 lations, and How to Work with the Miaroscope, by Dr. Lionel S. 

 Beale, may be iiamed as likely to be useful for reference. 

 Most good firms now publish a little pamphlet of directions, 

 giving full details regarding lenses, etc., for distribution with 

 their microscopes. , ^ , . , .,.,..: 



