We notice here that this tone-production may be originated in three different ways:--(1) The vocal ligaments may meet _after_ the air has commenced to pass between them. Of this an aspirate is the result. (2) The vocal ligaments may meet _before_ the air has commenced to pass between them. This causes a check or a click at the beginning of the tone. (3) The vocal ligaments may meet just at the very moment when the air passes between them. In this case the tone is properly struck. There is nothing to make it indefinite as in case No. 1, and nothing to impede it as in case No. 2. Production as in case No. 3 causes the tone to travel much farther than production as in cases Nos. I and 2, and it is this way of striking a tone which is known under the name of "Coup de Glotte" or "Shock of the Glottis." "But it is not a shock of the glottis at all," says Mr. Lunn, on page 68 of the book quoted before. "It is an audible result arising from the false cords [pocket ligaments] releasing condensed air imprisoned below them, which air in its release explodes." I beg leave to observe that condensed imprisoned air thus released could produce a puff, but not a musical tone. The matter is, moreover, capable of being demonstrated to the eye. The process takes place as described above, and I am ready at any moment to show that the pocket ligaments _never_ meet in singing. There can, therefore, be no possibility of condensed air being imprisoned below them, and we need not enter into any further argument on the subject. [Illustration: PLATE XIII. LARYNGOSCOPIC IMAGE. BREATHING. T. TONGUE. L. LID. V. V. VOCAL LIGAMENTS. W. W. CARTILAGES OF WRISBERG. S. S. CARTILAGES OF SANTORINI. ] [Illustration: PLATE XIV. LARYNGOSCOPIC IMAGE. UPPER THICK. T. T. TONGUE. L. LID. P. P. POCKET LIGAMENTS. V. V. VOCAL LIGAMENTS. W. W. CARTILAGES OF WRISBERG. S. S. CARTILAGES OF SANTORINI. ] [Illustration: PLATE XV. LARYNGOSCOPIC IMAGE. UPPER THIN. T. T. TONGUE. L. LID. P. P. POCKET LIGAMENTS. V. V. VOCAL LIGAMENTS. W. W. CARTILAGES OF WRISBERG. S. S. CARTILAGES OF SANTORINI. ] [Illustration: PLATE XVI. LARYNGOSCOPIC IMAGE. SMALL. T. T. TONGUE. L. LID. P. P. POCKET LIGAMENTS. V. V. VOCAL LIGAMENTS. W. W. CARTILAGES OF WRISBERG. S. S. CARTILAGES OF SANTORINI. ]