PLATE II. 





Live slide for the continuous observation of amoeba? in solutions of constant strength. The amcebie 

 are placed on the cover-slip, which is prevented from pressing on the glass plate underneath by the 

 interposition of two strips of thin paper. The sol ntion slowly circulates from the bottle along the 

 wick to a piece of linen on the glass plate and prevents the preparation from drying up. 



Upper surface of the above "live slide. 



20] 



