292 MICROSCOPY FOK BEGINNERS. 



like crystals of this salt, heat a drop over the lamp. As 

 soon as the crystals begin to form at any point, tilt the 

 slide so that the liquor may ran off, then continue the 

 crystallization by gentle warmth. 



There are many other salts which produce beautiful 

 crystals when treated in the above or a similar manner, 

 but the student would doubtless prefer to experiment 

 for himself, rather than to have a bare list set down be- 

 fore him. And there are innumerable other common 

 objects easily to be procured and worthy of study. It 

 is not possible to enumerate a millionth part of them. 

 Examine for yourself. Try and see what a good thing 

 a microscope is. And the writer wishes the reader ev- 

 ery success in the use of the delightful instrument. 



