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. The Philippine Journal of Science - Seite 421907Vollansicht - Über dieses Buch
| Chemical Society (Great Britain) - 1898 - 1020 Seiten
...a tightly fitting cover. This is then heated for 7 minutes over the full flame of a Bunsen burner. 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 20 to 25 cm. high when burning free, and the... | |
| 1898 - 356 Seiten
...platinum crucible, weighing 20 to 30 grms. and having a tightly fitting cover. Heat over the full flame of a Bunsen burner for seven minutes. The crucible should...supported on a platinum triangle with the bottom 6 to 8 cm above the top of the burner. The flame used should be 20 to 25 cm high when burning free, and the... | |
| Andrew Alexander Blair - 1876 - 456 Seiten
...crucible weighing 20 or 30 grammes 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 from 6 to 8 cm. above the top of the burner. The flame should be fully 20 cm. high when burning free,... | |
| Michigan. Geological Survey - 1900 - 838 Seiten
...platinum crucible, weighing 20 to 30 grams and having a tightly fitted 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 (i to S centimeters above the top of the burner. The flame used should be 20 to 25 centimeters high... | |
| United States. Philippine Commission (1900-1916) - 1901 - 608 Seiten
...platinum crucible weighing 20 to 30 grams and having a tightly fitting cover. Heat over the full flame of a Bunsen burner for seven minutes. The crucible should...to 8 centimeters above the top of the burner. The flame should be fully 20 centimeters high when burning free, and the determination should be made in... | |
| 1908 - 874 Seiten
...crucible weighing 20 or .'!(> grams and having a tightly fitting rover. Heat over the full flame of a Bunsen burner for seven minutes. The crucible should...supported on a platinum triangle, with the bottom ti to S centimeters above the top of the burner. The flame should be fully 20 centimeters high when... | |
| 1909 - 516 Seiten
...crucible weighing 20 or 30 grams and having a tightly fitting cover. Heat over the full flame of a Bun sen 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. high when burning free, and the determination... | |
| 1904 - 480 Seiten
...crucible, weighing 20-30 grams, and having a well-fitting cover. Heat over the full flame of a Bunser burner for seven minutes. The crucible should be supported on a platinum triangle with the bottom 6-8 cm. above the top of the burner. The flame should be 25 cm. high, and the determination made in... | |
| Edmund Howd Miller - 1904 - 218 Seiten
...crucible, weighing 20-30 grams, and having a well-fitting cover. Heat over the full flame of a Bunser burner for seven minutes. The crucible should be supported on a platinum triangle with the bottom 6-8 cm. above the top of the burner. The flame should be 25 cm. high, and the determination made in... | |
| Clifford Richardson - 1905 - 616 Seiten
..."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...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... | |
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