180 Scientific Intelligence. — Mechanical PlnlosopJiij. 



the anterior and posterior cliambers of the eye were not replenished, 

 the cornea became sunk and wrinkled, a few bubbles of air penetra- 

 ted the anterior chamber, and the patient had no vision- 



Without yielding to the first meJancholy impression^ the operator, 

 by a happy presence of mind, conceived the hopes of filling the cav- 

 ity; he sent immediately for some distilled water, warmed it, placed. 

 the patient on his back, and filled tiie external orbit of the eye witli 

 the water, opened the eye lid and raised the flap of the cornea. The 

 water then penetrated into all the accessible cavities, the folds of the 

 cornea disappeared, and its convexity was restored. Having kept 

 the eye shut for some minutes, he then directed the patient to open . 

 it, and found it in the most satisfactojy condition, the patient distin- 

 guished all the objects presented to him as well as after the most 

 completely successful operation. A slight pain was felt after the in- 

 troduction of the water, which went off in a short time. From that 

 time the eye healed witliout difficulty, and when opened a week after 

 tl)e operation, it was free from swelling and inflammation ; the cornea 



H 



was perfectly united, but the pupil was a little obscure, the sight fee- 

 ble, and the patient complained that he did not see so well as imme- 

 diately after the operation. But six days after the bandage was re- 

 moved, the shade of the pupil was much diminished, the sight grew 

 stronger from day to day, and no doubt was entertained that the pa- 

 tient would soon be able to read common print. — Bib. Unit. OcL 

 1829. 



9. A remarJcahJe Watch. — M. Rebillek ha^ made a watch, aH 

 the wheels of which, and every portion of the works are visible from 

 the outside. The case, the bridges, and many of tlie wheels are of 



rock 



little inferior in 



hardness to tlie gems. 



The screws are tapped in tlie crystal itself, all the holes are sunk 

 in rubies, tlie piece which forms the escapement is of sapphire j the 

 balance wheel is of crystal. 



When the difficulty of working in such a substance, on a scale re- 

 quiring so much delicacy as a watch which may be suspended from 

 a lady's neck is duly considered, one can scarcely conceive how the 

 maker could succeed in a Avork of this nature. It is a Kjott of re- 

 markable elegance, and the only one hitherto executed. M. Rebil- 

 ler assures us that it keeps time almost as well as a chronometer, 

 and he attributes this effect to the baUnce wheel being of crystal, and 



