BOYS AND GIRLS IN BIOLOGY. 



" taken in " by its feet. How odd it would be if, as 

 you walk along, you should suddenly disappear into 

 your boots! If you crush the amoeba, you find no 

 trace of a tough sac, as you saw in the torula or 

 protococcus ; you can see the nucleus only, and that 

 but for a little while. If you stain with magenta or 

 iodine, the whole substance becomes colored alike (Fig. 

 75) ; if there were a sac, it would not be stained. The 

 iodine does not give it a blue color, so there cannot be 

 any starch in the amoeba. The new amceb^e, or blood- 

 cells, are made like the new protococci, or mould-cells, 

 by fission. You will first see two nuclei, or kernels, 

 in one of the old cells. If you watch closely, you will 

 see a partition (Fig. 76) going straight through the 



Fig. 76. 



Partition between the 

 Two Kernels. 



Heart. 



body of the old cell between the two kernels— thus 

 are formed two new cells, each within its own kernel, 

 or nucleus — and these follow in the footsteps of their 

 ancestors, making new kernels and new divisions. If 



