Show Iron Ores Formed by Bacteria Ge Geologists are realizing more fully as they extend their studies the magnitude mag mag- magnitude of t the work done by plants and animals In building up and tearing down va parts of the crust of the earth h ha d Even Een microscopic organisms perform performa a large part of or this work Pasteur i long ong ago show showed d us the deadly power of bacteria in disease and their em j t. t clency in promoting fermentation but their their heir Influence on the thc fertility of ot soli t tand and their work In ln expediting rock decay decay de- de j de-j 0 cay are uee still sUll subjects of scientific ei study 1 |