Report of the National Vaccine Establishment. 97 
down by Professor Berzelius, for the mixture of the artifi- 
cial triple compounds, or “‘ double salts,” take place also in 
natural combinations. The results which I have hitherto 
obtained, from more than ten analyses of different mag- 
nesian limestones, agree beyond all expectation with the 
views of Berzelius. 
T shall also observe in the last place, that T have found 
both in the Saxon strontianite from Braundorff \ near 
Freyberg, and in the Scotch strontianite analysed by Pel- 
letier and Klaproth, several parts in 100 of carbonate of 
lime. It was this occurrence of small portions of carbonate 
of lime with the carbonate of strontia, that led me to the 
examination of the arragonite, which has furnished the re- 
sults that I have had the pleasure of communicating to you. 
{It appears also from the correspondence of the gentle- 
man who has favoured us with a manuscript copy of this 
letter from the continent, that some traces of strontia had 
before been observed in Carrara marble by a pupil of Ga- 
dolin in Abo, who extracted it by digesting a large quantity 
of powdered marble with a little muriatic acid: but our 
correspondent remarks that Carrara marble does not possess 
the properties of the arragonite.] 
= 
IV. Report of the National Vaccine Establishment, Dated 
22d April, 1813. 
To the Right Hon. Viscount StpmMoutnu, Principal Secre- 
tary of State, Home Department, Sc. &c. ec, 
National Vaccine Establishment, 
Leicester-Square, April 22, 1813, 
My Torn T ik Board of the National Vaccine Esta- 
blishment have the honour of informing your lordship, that 
during the year 1812 the Surgeons appointed by their au- 
thority to the nine Stations in London have vaccinated 
4,521 persons, and have distributed 23,219 charges of vac- 
cine lymph to the public, The number vaccinated this year 
exceeds that of 181] by 1,373, and the demand for lymph 
has heen often so great that it could not without difficulty 
be supplied. The Board had last year reason to think that 
nearly two-thirds of the children born in the metropolis 
were vaccinated by charitable Institutions, or private practi- 
tioners. ‘There is now reason to believe that three-fourths 
of those born are submitted to that salutary operation. 
But though the prejudices against the cow-pock, which have 
been artfully encouraged by ignorant and interested men, 
appear 
