"But," he continues, "there is yet wanting some remedy that shall rapidly counteract the poison introduced into the blood, and assist in expelling it from the system. The well-authenticated accounts of the success attending the internal use of arsenic in injuries arising from the bites of venomous reptiles in the East and West Indies, and also in Africa, and the well-known properties of this medicine as a powerful tonic and alterative in conditions of impaired vitality of the blood arising from the absorption of certain blood-poisons, would lead me to include this agent in the treatment already mentioned. It should be administered in combination with ammonia, in full doses, frequently repeated, so as to neutralize quickly the poison circulating in the blood before it can be eliminated from the system. This could readily be accomplished by adding ten to fifteen minims of Fowler's solution to the compound spirit of ammonia, to be given every quarter of an hour in aerated or soda-water, until the vomiting and the more urgent symptoms of collapse have subsided, subsequently repeating the dose at longer intervals until reaction had become fully established, and the patient relieved by copious bilious dejections." _Cedron_, which is a nut that grows on the Isthmus of Panama, and which is sold by the druggists in New York, is said to be an infallible antidote to serpent-bites. In the _Bullet. de l'Acad. de Med._ for February, 1858, it is stated that a man was bitten at Panama by a _coral snake_, the most poisonous species on the Isthmus. During the few seconds that it took him to take the cedron from his bag, he was seized with violent pains at the heart and throat; but he had scarcely chewed and swallowed a piece of the nut about the size of a small bean, when the pains ceased as by magic. He chewed a little more, and applied it externally to the wound, when the pains disappeared, and were followed by a copious evacuation of a substance like curdled milk. Many other cases are mentioned where the cedron proved an antidote. CHAPTER V. Bivouacs. Tente d'Abri. Gutta-percha Knapsack Tent. Comanche Lodge. Sibley Tent. Camp Furniture. Litters. Rapid Traveling. Fuel. Making Fires. Fires on the Prairies. Jerking Meat. Making Lariats. Making Caches. Disposition of Fire-arms. Colt's Revolvers. Gun Accidents. Trailing. Indian Sagacity. BIVOUACS AND TENTS. In traveling with pack animals it is not always convenient or practicable to transport tents, and the traveler's ingenuity is often taxed in devising the most available means for making himself comfortable and secure against winds and storms. I have often been astonished to see how soon an experienced voyager, without any resources save those provided by nature, will erect a comfortable shelter in a place where a person having no knowledge of woodcraft would never think of such a thing. Almost all people in different parts of the world have their own peculiar methods of bivouacking.