70 THE MICROSCOPE AND CELL-STRUCTURE. 



10. Explain the operation of cutting and mounting sections of plant 

 structures for examination under the microscope. Why are such 

 sections cut thin ? 



11. How would you withdraw the water from a living cell without 

 killing the protoplasm ? Draw its appearance when thus treated, 

 under the same power, and explain, so far as possible, the process that 

 has taken place. 



