Journal, Band 54,Ausgabe 21899 Includes the institute's Proceedings. |
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Beliebte Passagen
Seite 4 - Warren) read the minutes of the last meeting, which were confirmed and signed by the Chairman. The OFFICIAL MANAGER (Mr.
Seite 545 - The flame should be fully 20 cm. high when burning free, and the determination should be made in a place free from draughts. The upper surface of the cover should burn clear, but the under surface should remain covered with carbon. To find Volatile Combustible Matter, subtract the per cent.
Seite 545 - Place 1 gram of pure bitumen in a " platinum crucible weighing 20 or 30 grams and having a tightly fitting cover. Heat over the full flame of a Bunsen burner for seven minutes. The crucible should be supported on a platinum triangle with the bottom 6 to 8 cm. above the top of the burner. The flame should be fully 20 cm.
Seite 338 - Slight faulting of the formation has occurred in some instances; but few folds are observed, and the bed is free from sudden or extreme variations from the average thickness. The deposit has a distinctly stratified structure and is composed largely of pyrolusite, but other oxides of manganese also occur. In many instances, strata of sandstone, or of loose, friable arenaceous...
Seite 440 - Firmstone t gives a large number of illustrations made from actual measurements of the forms assumed by the charge in the blast-furnace as affected by various methods of filling.
Seite 496 - In the art of mixing molten metal to secure uniformity of the same in its constituent parts preparatory to further treatment...
Seite 348 - Sodium, potassium, and rubidium, are constituents of meteoric irons, but only in minute proportions. 5. Chromium and manganese are found in meteoric stones, but not in the irons, though very minute traces of manganese have been detected in two of our specimens. 6. Nickel is found as a principal constituent in all meteorites, meteoric irons, and siderolites. Cobalt occurs in the two latter varieties only. The chief points of difference between telluric and meteoric iron is the absence of nickel and...
Seite 548 - I.— UNITED KINGDOM. Mineral Statistics. — According to the official report of Her Majesty°s Inspector of Mines,* the production of coal in the United Kingdom in 1897 amounted to 202,129,931 tons.
Seite 374 - Wiltshire, though the three latter counties have hitherto been content to leave their underground riches unexplored. The Kent Coal Exploration Company is doing some good work with a reasonable chance of success ; though if they wish to find coal sufficiently near the surface they had better adhere as much as possible to the line of the North Downs, since operations on the Sussex side are only too likely to be within the influence of the Kimmeridgian gulf, which was proved to exist at Battle (Netherfield).
Seite 192 - Fe,C does not take place till a temperature of about 950° C. has been reached. The above results seem to indicate that it would be possible to convert iron up to the saturation- point (0-9 per cent.