 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
 | Arthur Horace Blanchard - 1919 - 1698 Seiten
...fitting cover. It is then heated for 7 min over the full Same of a Bunsen burner, as shown in Fig. 44. 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 freely,... | |
 | Joseph Ross - 1919 - 462 Seiten
...products have been burnt off. The crucible is 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 drafts. The upper... | |
 | Joseph Ross - 1919 - 462 Seiten
...products have been burnt off. The crucible is 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 drafts. . The... | |
 | Thomas Radford Agg - 1920 - 490 Seiten
...flame of a Bunsen burner. The crucible should be supported on a platinum triangle with the bottom from 6 to 8 centimeters above the top of the burner. The...flame should be fully 20 centimeters high when burning freely, and the determination should be made in a place free from drafts. The upper surface of the... | |
 | John Oliver Arnold, Fred Ibbotson - 1920 - 480 Seiten
...or 30 grammes and having a tightly fitting cover. Heat over the full flame of a Bunsen burner for 7 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... | |
 | Fred Ibbotson - 1920 - 312 Seiten
...burner for 7 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... | |
 | William Allen Hamor, Fred Warde Padgett - 1920 - 620 Seiten
...in Fig. 60. 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 freely, and the determination should be made in a place free from drafts. The... | |
 | David Talbot Day - 1922 - 1000 Seiten
...cover. It then is heated for seven minutes over the full flame of a Bunsen burner, as shown in Fig. 54. 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 freely,... | |
 | Albert Howard Low - 1922 - 408 Seiten
...3o-gram weighed platinum crucible 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 or pipe-stem triangle with the bottom 6 to 8 cm. above the top of the burner. The flame should be fully... | |
 | David Talbot Day - 1922 - 990 Seiten
...in Fig. 54. 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 freely, and the deter1 Page 704. initiation should be made in a place free from... | |
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