Vaccine Pock Institution. 383 
light for geodesical operations, was exhibited in the Reading- 
room, its nature, and arrangements chemical and mechanical, 
having been previously explained in the Lecture-room by 
Mr. Faraday. For an account of this light, see our report of 
the proceedings of the Royal Society. 
May 19.—Mr. Turrell read the first part of a practical 
essay upon steel-engraving, illustrating as he proceeded by 
numerous specimens of steel, steel plates, tools, specimens of 
art, &c. An impression from the fine mezzotinto on steel of 
Martin’s Belshazzar’s Feast, was hung up in the room. It is 
the largest specimen of steel engraving that has yet been ex- 
ecuted. A new and very pretty photometer was exhibited in 
the Library by Mr. Ritchie, of Nain. Its principle is that of a 
comparison of lights equalized by distance, but this is done in 
a new and very commodious way. The instrument has been 
described in a paper read to the Edinburgh Royal Society. 
A Burmese law was brought forward by Mr. Howship, and 
well illustrated the height to which that nation has attained, in 
the arts of writing, decoration, &c. 
VACCINE POCK INSTITUTION. 
We regret having to announce the dissolution of this es- 
tablishment, on Tuesday, March 21, 1826, at No. 44, Broad- 
street, Golden-square. Dr. Pearson, F.R.S., &c., delivered 
the following address to the Board on this occasion. 
Gentlemen,—The First Meeting of the Members of this 
Institution was holden on December 2, 1799, and on this day, 
Tuesday, March 21, 1826, we are assembled on the occasion 
of its dissolution. 
In justice to the Medical Officers and Managers, and for 
the satisfaction of the Subscribers who have supported this 
establishment, it is considered right to give a brief statement 
of the conduct and transactions since its foundation. 
In December 1799, a small body of Medical Practitioners 
founded the Original Vaccine Pock Institution, with the ob- 
ject of acquiring knowledge by practice of the newly proposed 
inoculation of the cow pock as vicarious of the small pox, 
the satisfactory instances, from experience, being at that pe- 
riod extremely limited. 
Subscriptions to the amount of about 200/. per annum were 
found sufficient to defray the expenses in the execution of this 
design. The physicians, surgeons, and apothecaries, not only 
serving gratuitously, but contributing equally with other sub- 
scribers pecuniary assistance. 
Although the great object of this society was not to produce 
the highest possible number of patients, but to gaat 
carefully 
