... but, since gardeners must often grow other plants in the grapery, mealy-bug sooner or later appears and is often hard to dislodge. It is best repelled by removing the loose bark on the trunks which harbor the pest and then washing with kerosene emulsion. When this becomes necessary, not only the vines but the rafters and all parts of the house should ... — Manual of American Grape-Growing • U. P. Hedrick Read full book for free!
... test was devised by Noguchi for the presence of syphilis, and is performed by injecting into the skin an emulsion of dead germs. A pustule forms if the test is positive. It is of practical value only in late syphilis, and a negative test is no proof of the absence of the disease. Positive tests are sometimes obtained when syphilis is not present. For these reasons ... — The Third Great Plague - A Discussion of Syphilis for Everyday People • John H. Stokes Read full book for free!
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