Rivers, work of the river mills in soil making, [60]
Roots, how lichens get along without them, [4];
how and why they work at different levels, [11];
how they make their way about (you won't wonder that Darwin said their actions suggested intelligence!), [186]
Sand, how it helps the soil to breathe, [59]
Seeds, how they determine the order of march of the trees, [12];
use of screw-propellers and other devices, [42], [49], [51];
how and why baby plants back into the world, [190];
how they tried to change a sprouting seedling's mind but couldn't, [195];
how "rag babies" tell the fortune of corn, [199]
Shrews, their work as ploughmen, [115];
where they spend the winter, [218]
Siberia, there you will find the voles and their root cellars, [212]
South America, home of the four-footed farmers that wear armor, [120];
and of the viscacha, [127];
a good place to look for flamingoes, [166];
and for oven-birds, [171]
South Sea Islands, one of the regions in which you find birds that hatch their babies with an incubator, [174]
Squirrels, how they help the trees to march, [14];
the winding streets of Ground-Squirrel Town, [123];
marmots, the largest of the squirrel family, [124];
how the tree-squirrels spend the winter, [218]
Swallows, their habits and their service as soil makers, [177]