ANIMAL LIFE AND THE MICROSCOPE 



water snails may be watched while using their rasp 

 upon the water plants or upon the green slime which 

 soon accumulates in aquaria. The eggs of snails 

 are easily found and should be examined, the queer 

 little inmates may be studied through the trans- 

 parent shells, in all stages of development. 



The naturalist whose inclinations lead him towards 

 the study of animal life will find plenty to occupy 

 his time and his microscope. All kinds of eggs of 

 small creatures may be watched as they develop. 

 Frogs' eggs are of interest in this respect, so too 

 are tadpoles which hatch from them. The whole 

 blood circulation in a young tadpole may easily be 

 studied under the microscope, the structure of the 

 external gills, the gradual change to internal gills, 

 the development of legs, the absorption of the tail 

 The tadpole and its marvellous changes will afford 

 sufficient microscopic material to last for many 

 weeks. 



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