i6 



PHYSIOLOGY. 



if we examine the slices we will find that those in water remain, 

 as at first, quite rigid, while those in the salt and sugar solutions 

 are more or less flaccid or limp, and will readily bend by pres- 



Fig. 17. Fig. 1 8. Fig. 19. 



Before treatment with salt After treatment with salt From salt solution into water 

 solution. solution. again. 



Figs. 17-19. Osmosis in cells of Indian corn. 



sure between the fingers, the specimens in the salt solution, 

 perhaps, being more flaccid than those in the sugar solution. 

 The salt solution, we judge after our experiment with spirogyra, 



Fig. 20. 



Fig. 21. 



Fig. 22. 



Rigid condition of fresh beet Limp condition after lying in Rigid again after lying again 



section. salt solution. in water. 



Figs. 20-22. Turgor and osmosis in slices of beet. 



withdraws some of the water from the cell-sap, the cells thus 

 losing their turgidity and the tissues becoming limp or flaccid 

 from the loss of water. 



