I have already stated that I was originally led into making these investigations through my simple desire of getting rid of my _German_ mode of expression in speaking the English language. Being determined to find out where the trouble was which prevented me from producing pure English sounds while I experienced no difficulty in producing pure German sounds, I pursued vocal sounds, through numerous phases, to their original sources. The endeavor to arrive at the true nature of vocal sounds through autology and by means of "introspection" has, no doubt, been made by thousands before me. The reason they were not more successful must be attributed to the simple fact that such persons have been lacking in perseverance. It is one of the most misleading endeavors one can pursue. In the beginning I came to what I considered a _positive_ result perhaps for the hundredth time, but to think I was on the wrong track the one hundred and first time. I would then, perhaps, finally determine that the first result arrived at, after all, was the correct one. In this manner I have in the course of time arrived at positive conclusions, which have been the basis of all my investigations, and are undoubtedly correct, as they have yielded up one result after another and have never proven false. For this, relatively speaking, "perfect insight" I have waited, before saying anything more at all, since my previous (preliminary) publication. To these conclusions I owe my present trust and confidence, and the "boldness and temerity," as some may say, in making such "startling declarations" in the face of the accumulated wisdom of the science of this and of past ages. Yet I am tired unto death of prevarication and of time-serving, and will say what I consider to be the truth, no matter what may be the consequence. Any one singing a false note or mispronouncing a foreign word or sound, yet knowing what the right note, word, or sound is and should be, can do the same thing, and by perseverance finally find what he has been looking for and pronounce such note, word, or sound in its entire purity. This will put him on the track to the production of _all_ pure notes or sounds. To accomplish this, he must persistently watch one result after another. My mode of proceeding has been largely in making parts _rigid_, and then observing the consequences. In pursuing this course for some time, you will finally attain such a mastery therein that you will be able to make almost any vessel, muscle, sinew, membrane, tissue, etc., or any _part_ thereof, rigid. This is done for the purpose of neutralizing parts which partake in the production of sounds, and will enable you to closely watch cause and effect in your natural, as well as artistic, course of breathing and sound production. _Having two languages at my command, I was startled to find that cause and effect in both were totally different from each other._ This gave me the original cue to all my observations.