The cyst continued daily to extend itself, and to separate the fungous edges; the fluctuation became more manifest, and the membranes thinner. At length, on the 15th of June 1757, Mr. Hopkins opened the cyst with the point of a lancet, and let out a large cup-full of limpid serum, without smell or taste. The boy felt very little pain in this operation. The cavity was filled with dry lint, and compresses dipt in warm red wine and water were applied over it. All the night following, and several days after, a great discharge of serum came away. On the 19th the fungus was considerably lessened. Mr. Hopkins then dressed the wound with warm _unguentum é gummi elemi_, and washed the fungus with a lotion of _aquarum calcis_, _rosarum_, _et tincturæ myrrhæ_. On the 23d, upon his removing the dressings, he saw the cyst loose and collapsed; which he extracted with his forceps, without the least difficulty, or pain to his patient. The fungus daily wasted afterwards, the wound digested well, and the lad was intirely cured on the 7th of August. His right eye is perfectly strong, and he has been free from complaint ever since. The remainder of the coats of the eye, and of the muscles, bear up the eye-lids, that when uncovered he only seems to have closed the left eye: however, he has wore all the winter a back patch over it, to guard against fresh cold. The cyst, when first taken away, measured three inches and half in length, one inch and half in diameter, and contained a large cup-full of water. It appeared to be the _tunica sclerotica_, was of a clear pellucid white, and of so delicate a texture, as scarce to admit of being touched without tearing; and when dried with all possible care, became so brittle, that Mr. Hopkins could hardly preserve it in the manner I now send it. REMARKS. In both Susannah Earle and John Law’s cases, the eye was distended by the accumulation of the aqueous humour, separated in great quantity by the repeated straining of the blood-vessels in the whooping cough, which might gradually relax and enlarge the aqueous ducts of Susannah Earle’s eye; and possibly by the rupture of those ducts, and of some blood-vessels, at the time John Law exerted himself violently in beating dung about the close: for in either case the _impetus_ of the blood must have been so violent, as to produce those effects. However, from the _hydrophthalmia_ succeeding the operation on John Law, the fungous excrescence, and continual serous discharge during several months from the wound, it plainly appears, that an abundance of aqueous humour was discharged at first by the distention or laceration of the aqueous ducts, and latterly for want of a contraction of those vessels, and of the lymphatics, which were no longer of use.