Polytechnic Institute of Vienna. 379 
tion, alcohol (whisky or spirits) may be changed from ten to 
fifteen degrees of Bauié, to forty or forty two degrees. 
Ann. de Chimie et de Physique Jul, 1825. 
4. Fumigation.—In consequence of the prevalence of an 
obstinate fever in the Milbank prison, in London, it was 
deemed expedient to purify the apartments and galleries of 
that extensive building by fumigation. This was performed 
under the direction of M. Faraday, professor in the Royal 
Institution. Equal parts of salt and oxide of manganese were 
placed in earthen dishes, each holding abouta gallon, and to 
two parts of the mixture were added two parts of sulphuric 
acid, previously mixed with one part of water, and cooled. 
No heat was applied. The mixture continued to give out chlo- 
rine during fourdays. All the passages and openings were care- 
fully stopped with mats, &c. Each vessel received about 
three and a third pounds of the mixture of salt and manga- 
nese, and it was estimated that this quantity yielded five and 
a half cubie feet of chlorine. The whole quantity used was 
700 pounds of common salt, 760 pounds of manganese, and 
1400 pounds of sulphuric acid. ‘The space fumigated was 
about 2,000,000 of cubic feet, and the surface of the walls, 
floors, and platforms, about 1,200,000 square feet, mostly in 
stone and brick, and chiefly plastered with lime.—Quarterly 
Journal of Science, No. 35. 
5. The Polytechnic Institute of Vienna was founded in 1815 
by the munificence of the emperor, who endowed it with a capi- 
tal of nearly a million of francs. This useful establishment is at 
once an academy, in which a numerous corps of pupils re- 
ceive the best instruction, in all the branches of arts, trades, 
and commerce, in order to practise their knowledge after- 
wards in workshops and manufactories; a conservatory, in 
which are assembled instruments, machines, and productions 
of all the arts; and a society for the encouragement of nation- 
al industry, which proposes and distributes prizes and re- 
wards, and maintains with the government systematic rela- 
tions on all the subjects of manufacturing industry. 
The Institute has opened in a vastand superb building, which 
the emperor had constructed, not only for elementary in- 
struction, but for practical courses on mechanics, architecture, 
civil and hydraulic, drawing of machines, chemistry applied 
to the arts, natural philosophy, &c. Examinations and pub- 
