In the cases of bleeding from a vein, the flow of blood is continuous, and is of a dark, red hue, and does not spurt in jets, as from an artery. This kind of bleeding is not usually difficult to stop, and it is not necessary that the vein itself be tied--unless very large--provided that the wound be snugly bandaged after it is dressed. After the first half hour, release the limb and see if the bleeding has stopped. If so, and the circulation is being interfered with, owing to the tightness of the bandage, reapply the bandage more loosely. In the case of an injured artery of any considerable size, the amount of pressure required to stop the bleeding will arrest all circulation of blood in the limb, so that great damage, as well as pain, will ensue if it be continued more than an hour or two, and during this time the limb should be kept warm by thick covering and hot-water bags, if they can be obtained. Bleeding _from a deep puncture_ may be stopped by plugging the cavity with strips of muslin which have been boiled, or with absorbent cotton, similarly treated, keeping the plug in place by snug bandaging. =BLEEDING FROM PUNCTURED WOUND.= _First Aid Rule 1.--Extract pin, tack, nail, splinter, thorn, or bullet, IF YOU CAN SEE BULLET; do not probe._ _Rule 2.--Pour warm water on wound and squeeze tissue to encourage bleeding. Send for small hard-rubber syringe._ _Rule 3.--If deep, plug it with absorbent cotton, and put tight bandage over plug. If shallow, cover with absorbent cotton wet with boric-acid solution (one dram to one-half pint of water), or carbolic-acid solution (one teaspoonful to the pint of hot water)._ _Rule 4.--When syringe comes, remove dressing, and clean wound by forcibly syringing carbolic solution directly into wound. Replace dressing._ A small punctured wound should be squeezed in warm water to encourage bleeding and, if pain and swelling ensue, absorbent cotton soaked in a boric-acid solution (containing as much boric acid as the water will dissolve) or in carbolic-acid solution (one teaspoonful of pure acid to the pint of warm water) should be applied over the wound and covered with oil silk or rubber or enamel cloth for a few days, or until the soreness has subsided. The dressing should be wet with the solution as often as it becomes dry. Punctures by nails, especially if deep, should be washed out with a syringe, using one of the solutions just mentioned. A medicine dropper, minus the rubber part, attached to a fountain syringe, makes a good nozzle for this purpose. A moist dressing, like the one described, should then be applied, and the limb kept in perfect rest for a few days.