322 
POPULAR SCIENCE REVIEW. 
for the last twenty years, he had been Professor of Chemistry. Having 
attracted the notice of Alexander von Humboldt by a paper on Fulminic 
Acid, he was appointed in 1824 extraordinary professor, and in 1826 
ordinary professor of chemistry in the University of Giessen. There he 
established a school for practical chemistry which obtained a world-wide 
reputation, and was attended by large numbers of pupils, many of whom 
have since become distinguished. In 1852 he became Professor of Chemistry, 
with charge of the chemical laboratory, at Munich. His works and papers 
on subjects connected with chemistry are very numerous. In this coimtry, 
his Organic Chemistry in its Application to Physiology and Pathology,” 
Organic Chemistry in its Applications to Agriculture,” Familiar Let- 
ters on Chemistry,” and his Natural Laws of Husbandry,” which appeared 
in 1863, are among the best known. The hereditary dignity of baron was 
conferred on him by the Grand Duke of Hesse in 1845. In recent years, 
his name has become familiarly connected with the utilisation, in the form 
of the well-known Liebig’s extract of meat,” of the meat of animals 
slaughtered in large numbers in South America for the sake of their hides 
and fat. His funeral was attended by all the civil and military authorities 
of Munich, including the judges and magistrates, and the professors of the 
colleges in the city, as well as by a large concourse of the inhabitants. 
METALLUKGY, MINERALOGY, AND MINING. 
Analysis of an Aventurine-Orthoclase . — This orthoclase, which has been 
found by Professor Leeds and is fully described in a late number of Silli- 
man’s American Journal,” is of a delicate flesh-red hue, which is due entirely 
to the embedded crystalline scales of what has been supposed to be gothite. 
The stone itself is translucent and quite colourless. The results obtained in 
two analyses were : — 
1 
2 
Mean 
Silica, 
64-80 
64-82 
64-81 
Alumina, 
Ferric oxide. 
19-02 
0-23 
j 19-25 1 
19-02 
0-23 
Lime, 
1-29 
1-23 
1-26 
Magnesia, 
0-61 
0-58 
0-59 
Potash, 
15-22 
13-38 
14-30 
Ign., 
0-26 
0-26 
0-26 
100-47 
African Diamond Dust.- 
—At a recent meeting of the California Academy 
of Sciences Mr. Hanks presented samples of the diamond deposit of South 
Africa, brought from thence by J. H. Riley — one of the first layer which 
has to be pierced to get to the diamond deposit, another of the deposit in 
which the diamonds are found, and another of pebbles found associated with 
the diamonds. The last, it was remarked, bore great similarity to the 
pebbles found at the mouth of the Klamath river, where microscopic dia- 
mond dust was found j also at the Pescadero, Santa Cruz county. 
