Abstract
The products of microorganisms collectively known as antibiotics, have been investigated extensively as aids to medical sciences, but they have not been thoroughly studied for possible other uses. Several papers have appeared in recent years concerning work done on antibiotic stimulation of growth in such domestic animals as young pigs and chicks, the addition of certain antibiotics, notably penicillin and streptomycin, to commercial feeds becoming somewhat general. it is also well known that certain antibiotics in very low concentration may stimulate growth of some bacteria. Most work involving higher plants dealt with antibiotic effects on germination of seeds, and growth characteristics were not noted.
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