The germs which produce poisoning do not float in the air, but may be conveyed by any thing which is not sterile, as, for instance, the splinter or the instrument that did the cutting, scratching or pricking. They may be carried to the scratch by our hands, by water, or cloth used for dressings. _Treatment_--Wash your own hands thoroughly with soap and water, using a nail brush. Clean the injured part well with disinfectant, as, for instance, alcohol and water, half and half, or peroxide of hydrogen--paint the spot with iodine, and cover with sterile gauze (if this is not to be had, use a piece of clean cloth that has been recently ironed), and bandage in place. If the bleeding is severe, a little pressure with the bandage over the dressing will stop it. Use the same precautions if the wound has to be re-dressed. 4. STINGS AND BITES OF INSECTS The poison injected by the sting or bite of an insect is usually acid, and the part should be washed at once with a solution of ammonia or soda (washing soda) to neutralize the poison. Then apply a paste of soda bicarbonate (baking soda) or wet salt and bandage in place. If the sting is left in the wound it must be pulled out before beginning treatment. 5. FOREIGN BODIES IN THE (a) EYE (Cinder) (b) EAR (Insect), (c) NOSE (Button) (a) _Eye_--If a cinder, eyelash, or any tiny speck gets into the eye it causes acute pain, and in a few minutes considerable redness. _Treatment_--Do not rub the eye, as this may press the object into the tender cornea so that it can be removed only with difficulty and by a physician. First close the eye gently, pull the eyelid free of the ball, and the tears may wash out the speck. If this is not successful, close the eye, hold the lid free, and blow the nose hard. You may then be able to see the speck and remove it with a bit of clean cotton or the corner of a clean handkerchief. If the object is lodged under the lid, and the foregoing efforts do not dislodge it, proceed to turn the lid up as follows: Ask the patient to look at the floor, keeping the eyeball as stationary as possible. Take a clean wooden toothpick or slender pencil, wrapped with cotton, place on the upper lid about one-fourth of an inch from the edge, grasp the eyelashes with the other hand, give a slight push downward toward the cheek with the toothpick, a slight pull upward on the lashes and turn the lid over the toothpick. Remove the speck and slip the lid back in position. Wash the eye with boric acid solution. If you are still unable to dislodge the body, discontinue any further efforts, apply a cloth wet in cold boric acid solution and send for the doctor. Anything done to the eyes must be done with the greatest gentleness. If an acid has entered the eye, neutralize it with a weak solution of soda bicarbonate in water. If an alkali (lime) is the offending substance, neutralize by a weak vinegar solution. Follow in each case with a wash of boric acid solution.