Annual Report of the State Mineralogist for the Year Ending ... 1883
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In our eReader you can find the full English version of the book. Read Annual Report of the State Mineralogist for the Year Ending ... 1883 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Annual Report of the State Mineralogist for the Year Ending ... 1883
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To quickly assess the difficulty of the text, read a short excerpt:
The use of this instrument is simple, and once seen is easily under- stood and practiced. The substance supposed to contain boracic acid is placed in an evaporating dish, and a few drops of sulphuric acid added. A brisk effervescence generally takes place. The contents of the dish must be stirred, which may be done with a small stick, or anything convenient at hand. Alcohol is then poured in, in small quantity, and ignited. All that is then required to determine the presence of borax or boracic... acid is to look at the flame through the spectroscope. Three distinct and beautifully green bands will be seen if boracic acid is present.
If free boracic acid is contained in the sample, the green bands may be produced without the introduction of sulphuric acid. It is best, however, always to use the acid, which decomposes the salt con- taining the weaker boracic acid, and to make a secondary test to prove the boracic acid to be free or otherwise.
The experiment should be made in a dark room. The bands are best seen when the slit is so far closed as to show the sodium band, always present, as a very narrow line.
What to read after Annual Report of the State Mineralogist for the Year Ending ... 1883?
You can find similar books in the "Read Also" column, or choose other free books by California State Mining Bureau to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The use of this instrument is simple, and once seen is easily under- stood and practiced. The substance supposed to contain boracic acid is placed in an evaporating dish, and a few drops of sulphuric acid added. A brisk effervescence generally takes place. The contents of the dish must be stirred, which may be done with a small stick, or anything convenient at hand. Alcohol is then poured in, in small quantity, and ignited. All that is then required to determine the presence of borax or boracic... acid is to look at the flame through the spectroscope. Three distinct and beautifully green bands will be seen if boracic acid is present.
If free boracic acid is contained in the sample, the green bands may be produced without the introduction of sulphuric acid. It is best, however, always to use the acid, which decomposes the salt con- taining the weaker boracic acid, and to make a secondary test to prove the boracic acid to be free or otherwise.
The experiment should be made in a dark room. The bands are best seen when the slit is so far closed as to show the sodium band, always present, as a very narrow line.
What to read after Annual Report of the State Mineralogist for the Year Ending ... 1883?
You can find similar books in the "Read Also" column, or choose other free books by California State Mining Bureau to read onlineMoreLess
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