Before publishing the complete and voluminous exposition I prepared on acupuncture, with precise translations of the Chinese texts, references and quotations, I decided, in order to answer the questions of many physicians, to describe here the essential part of the method, the main points, and the way to treat some diseases, in front of which Europe is more or less unarmed. The public, on the other hand, by means of this volume, will be able to distinguish, among the physicians who practice acupuncture, those who have drawn on the sources, and those who, given the great development taken by this method, pretend to apply it without having studied it, relying either honestly on suggestion, or, less honestly, on the ignorance of their clientele or even on the power of publicity. In fact, since I was the first to introduce in France the method of needles and "Moxa", which I had studied in China since 1901, thus enabling scholars in America and Europe who had only vague and confused ideas about the method to put it into practice, the experiments have multiplied more and more. Success was confirmed. It could no longer be ignored.