540 Progress in Science. (October, 
a way as to ensure perfect combustion, and the consequent absence of smoke. 
The fuel and air are fed automatically into the revolving furnace in which the 
puddling is effected, and therefore without the mediation of a separate com- 
bustion-chamber. A very intense, though regular, temperature is obtained, 
and the phosphorus and sulphur are said to be eliminated to a very large 
extent from the pig-iron. The furnace is recommended not only by its 
economy of fuel, but also by the rapidity with which the puddling is effected. 
With a furnace 12 feet in length and 6 feet in diameter, the inventor has 
puddled pig-iron in an hour and a quarter from the time when it was cold. 
The revolving portion of the furnace is protected by a water-casing, and the 
difficulties of contraction and expansion incident to other revolving furnaces 
are said to be completely conquered. 
The other papers bearing on Metallurgy brought before the Institute were 
for the most part on mechanical subjects. Among these we may mention one 
by Mr. Holley, of New York, descriptive of the general arrangement and 
principal details of the plant used in America for rolling steel rails. 
MINERALOGY. 
In compliment to the late M. Rivot, of the Ecole des Mines, the name of 
Rivotite has been bestowed upon a new mineral, which occurs in irregular 
masses disseminated through limestone on the west side of the Sierra del 
Cadi, in Lerida, Spain. It is an amorphous, compact, opaque mineral, varying 
in colour from yellowish-green to deep greyish-green. From its analysis the 
following formula may be deduced :—Sb20;+4(Cu,Ag)O. 
The memory of Dr. Livingstone is to be perpetuated in a new mineral spe- 
cies found at Huitzuco, in the State of Guerrero, Mexico. Livingstonite 
resembles ordinary antimony-glance, or stibnite; but with its lead-grey colour 
gives a red powder, and is thus distinguished from the antimony-ore. More- 
over, M. Mariano Barcena, who has named the species, found it to contain 
Io per cent of mercury, and it appears, indeed, that Livingstonite is a double 
sulphide of mercury and antimony. 
Guanovulite is the name under which Dr. F. Wibel proposes to distinguish 
a pale yellow crystalline body which occurs associated with the eggs some- 
times found in deposits of guano. Analysis shows it to be a hydrous 
sulphate of ammonia and potash, with an acid sulphate of potash. 
Prof: Vom Rath, of Bonn, has described a new zeolitic mineral from the 
granite of the Isle of Elba. Foresite, as the new mineral is called, was found 
near the village of San Piero in Campo, and occurs in association with other 
zeolites, such as stilbite and heulandite. It is a hydrous silicate of alumina, 
lime, and soda, crystallising in the orthorhombic system. The name is com- 
plimentary to Sig. R. Foresi, of Portoferrajo, who has done much to aid in 
keeping up an interest in the mineralogy of Elba. 
Under the name of Veszelyite a new mineral has been described by Prof. 
Schrauf, of Vienna. It is a hydrated phosphate of copper, presenting a 
bluish-green colour, and crystallising in the triclinic system. The mineral 
occurs on garnet, at Morawitza, in the Banat. 
In continuation of Mr. E. S..Dana’s researches on the crystallography of 
Datholite, he has applied himself to the study of the fine specimens in the 
K.K. Hof-Mineralien Kabinet at Vienna, and has published his studies in 
Tschermak’s ‘* Mittheilungen.” 
A valuable series of mineralogical contributions has been submitted to the 
German Geological Society by Herr Max Bauer, of Berlin, and published in 
the Society’s “‘ Zeitschrift.” These studies relate to the rarer forms of garnet, 
to the physical properties of mica, the optical characters of margarite, the 
twin-striz of iron-glance, and some peculiar crystals of smoky quartz from 
Switzerland. - 
