 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...  Municipal Engineering - Seite 3791911Vollansicht - 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...above the top of the burner ; the flame should be 20 to 25 cm. high when burning free, and the experiment made in a place protected from draught. The... | |
 | 1898 - 356 Seiten
...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...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 determination made in a place free from... | |
 | Andrew Alexander Blair - 1876 - 456 Seiten
...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,... | |
 | Incorporated Institution of Gas Engineers, London - 1899 - 296 Seiten
...fitting cover. Heat over the full flame of a Bunseu burner for seven minutes. The crucible should bo supported on a platinum triangle with the bottom 6 to 8 cm. above the top of the burner. The flame used should be -2.0 to -25 cm. high when burning free, and the determinaiiou made in a place free from... | |
 | Michigan. Geological Survey - 1900 - 838 Seiten
...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... | |
 | International Correspondence Schools - 1900 - 728 Seiten
...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 the determination made in a place free from drafts. The upper surface of the cover should burn clear, but the under surface... | |
 | United States. Philippine Commission (1900-1916) - 1901 - 608 Seiten
...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 centimeters above the top of the burner. The flame should be fully 20 centimeters high when burning... | |
 | 1908 - 874 Seiten
...and having a tightly fitting rover. Heat over the full flame of a Bunsen burner for seven minutes. The crucible should be 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
...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...determination should be made in a place free from draughts. The tipper surface of the cover should burn clear, but the tinder surface should remain covered... | |
 | 1904 - 480 Seiten
...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... | |
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