"Now, this method of blasting in oil wells has been patented, or, at least, the cases for the glycerine and the manner of exploding it has, and the company, which has its office in Bradford, use every effort to discover infringements of their patent. Like all owners of patent rights, they charge an extra price for their wares, and the result is that there are parties who will, for a much smaller amount of money, shoot a well and infringe the patent at the same time. These people are called moonlighters, and the risk they run of losing their lives or their liberty is, to say the least, very great. The lecture-hour has now been fully, and I hope I may say profitably, employed." "If it profits one to learn of your friends, the moonlighters, then your lecture has been a success. But how do you find excitement in anything they do? Surely they do not make public their unlawful doings." "Oh, everything save the shooting of the well is done legally, and with many even that is questionable! The cases are to be tried, and many believe that the owners of the patent have really no rights in the premises. The owners or prospective owners of the land whereon the wells are to be sunk, employ me to survey their tracts, and by that means I frequently make the acquaintance of those people who, for the almighty dollar, will peril their lives driving around the country with nitro-glycerine enough to blow an entire town up." "Let me trespass once more on you for dry detail, and then I will learn anything else I may want to know from observation. What is nitro-glycerine?" "I will answer your question by quoting as nearly as I can from what I read the other day. It is composed of: Aqueous vapor 20 parts. Carbonic acid 58 " Oxygen 3.5 " Nitrogen 18.5 " "Until 1864 it found no practical application, except as a homeopathic remedy for headache, similar to those which it causes. In that year, Alfred Nobel, a Swede, of Hamburg, began its manufacture on a large scale, and, though he sacrificed a brother to the terrible agent he had created, he persevered until in its later and safer forms nitro-glycerine has come into wide use and popularity. It is a clear, oily, colorless, odorless, and slightly sweet liquid, and can, with safety, only be poured into some running stream if one wishes to be rid of it. Through the pores of the skin, or in the stomach, even in small quantities, this oil causes a terrible headache and colic, while headaches also result from inhaling the gases of its combustion. It has thirteen times the force of gunpowder, exploding so much more suddenly than that agent does, that in reality it is much more powerful, and it is this same rapid explosive power that prevents it from being used in fire-arms."