Every Inch Protected 



Not only in the form of cactus shown here, but in 



practically every form, the spines are so arranged as to protect 



every inch of the surface. It will be seen tliat it would scarcely be 



possible to touch a finger to the skin of the caclus plant above, 



so completely does the armor protect it. This form of 



cactus also gives an interesting illustration of the 



fact tltat away back in its history, the plant, 



instead of having flat slabs, had round 



stalks. In this picture the three 



joints of the round stalk 



can be clearly seen. 



