 Place 1 gram of fresh, undried, powdered coal 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...  Annual Reports of the Secretary of War - Seite 413von United States. War Department - 1909Vollansicht - Über dieses Buch
 | Albert Howard Low - 1905 - 316 Seiten
...3o-gram weighed platinum crucible having a tightly fitting cover. Heat over the full flame of a Bu risen burner for seven minutes. The crucible should be supported on a platinum or pipe-stem triangle with the bottom 6 to 8 cm. above the top of the burner. The flame should be fully... | |
 | Albert Howard Low - 1905 - 318 Seiten
...per cent. of volatile combustible matter will be 34-25 -(3S-25 X 0.0187) = 33.61. flame of a Bunsen burner for seven minutes. The crucible should be supported on a platinum or pipe-stem triangle with the bottom 6 to 8 cm. above the top of the burner. The flame should be fully... | |
 | Clifford Richardson - 1905 - 616 Seiten
...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. high when burning free, and the determination should be made in a place free from draughts. The... | |
 | Thomas J. Foster - 1905 - 1056 Seiten
...tightly fitting cover. Heat over the full name of a Bunsen burner for 7 minutes. The crucible shpuld be supported on a platinum triangle with the bottom 6 to 8 cm. above the top of the burner. The flame used should be fully 20 cm. high when burning free, and... | |
 | Andrew Alexander Blair - 1906 - 340 Seiten
...weighing 20 or 30 grammes and having a tightly fitting cover. Heat over the full flame of a Bunsen burner for seven minutes. Th'e crucible should be supported on a platinum triangle with the bottom from 6 to 8 cm. above the top of the burner. The flame should be fully 20 cm. high when burning free,... | |
 | 1906 - 446 Seiten
...crucible, weighing 20 or 30 grms. and having a lightly 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 б to 8 cm above the top of the burner. The flame should be fully 20 cm high when burning free, and... | |
 | Andrew Alexander Blair - 1906 - 340 Seiten
...seven minutes. The crucible should be supported on a platinum triangle with the bottom from 6 to 8 cm. above the top of the burner. The flame should be fully 20 cm. high when burning free, and the determination should be made in a place free from draughts. The... | |
 | Geological Survey (U.S.) - 1907 - 64 Seiten
...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...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... | |
 | Ralph Arnold, Robert van Vleck Anderson - 1907 - 564 Seiten
...weighing 20 or 30 ({rains and having a tightly fitting cover. Heat over the full flame of a Bunsen burner for seven minutes. The crucible should be supported...high when burning free, and the determination should IK' made in a place free from draughts. The upper surface of the cover should burn clear, but the under... | |
 | 1907 - 616 Seiten
...crucible weighing 20 to 30 grams and having a tightly fitting cover. Heat over the full (hiiiiiof a Bunsen burner for seven minutes. The. crucible should be...6 to 8 centimeters above the top of the burner The name should be fully 20 centimeters high when burning free, and the determination should be made in... | |
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