51 



Order. Among the requisites for successfully 

 prosecuting work with the microscope are a strict 

 observance of the instructions, even if they appear 

 superfluous, a systematic way of doing work, and 

 cleanliness. Have a place for every article which 

 is required, so that the hand may immediately be 

 placed upon it ; after it has been used clean it before 

 putting it aside ; keep strange hands from your 

 apparatus unless you are assured that a knowledge of 

 its manipulation exists. 



Material. Although the purpose of this manual 

 is to be a guide to the intelligent use of the micro- 

 scope and not the preparation or preservation of 

 objects, it may not be out of place here to enumerate 

 what every owner of an instrument should have at 

 the outset. The first should be a book on objects 

 giving proper instruction on their preservation. 

 There are many of these, and all of them good. Next 

 in order, slides, covers and labels are necessary. As 

 covers are easily broken in cleaning, a larger propor- 

 tion of them will be necessary. 



A cabinet for slides, a large variety of which may 

 be selected from, will aid in starting work in a sys- 

 tematic manner. Forceps and a small pipette are 

 indispensible. For preserving objects, Canada bal- 

 sam or damar should be purchased, while the other 

 necessary material which may be gleaned from the 

 instruction book is easily obtainable. 



When it is intended to do section-cutting a good 

 mechanical microtome, not necessarily expensive, 

 should be obtained at the outset. 



