Mr. GniTPm <m the, Statical Relations of the Gases. 5d 



the opacity was completely removed, bj the excision of the layer of 

 sulpho-proteic acid, on the dead animal, it was conceived that the idea 

 of performing the operation upon a living animal was justifiable. Ac- 

 cordingly, a dog was selected as the subject of experiment It was 

 properly secured on a table, and a muzzle was applied, so as to pre- 

 vent it from using its teeth. It was considered also that it should be 

 kept as steady as possible, in order to give a fair chance to the experi- 

 ment. The end of a glass rod dipped in oil of vitriol was rubbed over 

 the transparent part of the eye. White opacity was produced in 

 a few seconds. The action was allowed to continue for two minutes, 

 the eyelids being carefully kept aside. In order to prevent the acid 

 from extending to the mucous membrane of the eye-lids, a piece of 

 lint dipped in a solution of carbonate of soda was then applied to the 

 eye, and the animal left at rest for five minutes. On removing the 

 lint, the cornea presented a white appearance, and was obviously quite 

 opaque. Having secured the eyelids, the conjunctiva was removed by 

 means of a pair of scissors, assisted by a scalpel and forceps, and the 

 denuded cornea was then scraped by means of the scalpel, until it 

 appeared to bo deprived of its white opacity. A slight degree of dull- 

 ness remained, which appears to have proceeded from the exudation 

 on the surface of the cornea, for in a day or two the perfect transpar- 

 ency of that membrane was restored, and the animal lived for many 

 weeks with complete vision of the eye. Dr. Krauss of London, who 

 assisted the author in the experiment, and to whom the dog belonged, 

 satisfied himself that the eye which had been operated on, retained as 

 perfect vision as that of the other eye, until the death of the animal 

 some weeks afterwards from an accidental cause. 



The author has been induced to give publicity to this successful 

 experiment, because he considers that he has seen eyes which might 

 have thus been restored to vision, if the operation had been performed 

 immediately after the receipt of the injury. The anim^ did not 

 appear to suffer pain, except when any fluid came in contact with the 

 eye-lids. 



XIX. — On the Statical Relations of the Gases. 

 By John Joseph Gritfin. 



The following Table is in part translated from a Table contained 

 in the fourth edition of Rose's Handbuch der Analytiehen Chemie. 

 Berlin, 1838. It is however modified in several particulars. The 

 third, fourth, and fifth columns are new. 



The plan of the Table is as follows : — 



The first column contains the names of the gases, both elementary 

 and compound, including, for facility of reference, the vaporisable 

 elements, and also the non-volatile elements. Boron, Carbon, &c., with 

 their assumed specific gravity, atomic measure, &c. 



The second column exhibits the composition of the different gases 



