The Analysis of Black Powder and Dynamite Page: 35
89 p. : ill.View a full description of this report.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
DYNAMITE. 35
Results of ether extraction of two explosives in diferent conditions.
1 2 8 4 6
Sample. Condition. Moisture. Extract. Difference.
Per cent. Per cent. Per cent.
A 1 10.70 26.52 059
A 2 .44 a 25. 93 J
B 1 5. 70 25.79 t .36
2 .45 a 25. 43
a Calculated to explosive in original condition.
The amount of moisture present in the dried samples was found
by desiccating portions of each sample for a further period of three
days in ordinary sulphuric-acid desiccators.
The values in column 4 represent the total loss on extraction less
the moisture content of the sample, all results being expressed as
a percentage of the amount of original undried explosive.
Assuming that the extracts from the samples in their original
condition (condition 1) are larger than those from the dried samples
(condition 2) because of loss of water-soluble nitrate in the moisture
taken up by the ether, it is apparent that in the case of ordinary
dynamite containing only one or two per cent moisture any loss from
this source is negligible.
DETERMINATION OF NITROGLYCERIN.
The nitrogen of organic or inorganic nitrates or nitrites is readily
evolved as nitric oxide (NO) by reaction with sulphuric acid and
mercury in the nitrometer. A determination of such nitrogen in
the extract therefore serves as a means of calculating the amount
of nitroglycerin present. The form of nitrometer found by the
authors to be most satisfactory for explosives work is the modified
Lunge nitrometer, as illustrated in Plate III.
THE NITROMETER.
This instrument a consists of six glass parts as follows: A globe-
shaped reservoir (a); a generating bulb (b) of about 300 c. c. capacity,
the generating bulb having stopcocks at both top and bottom to
permit a violent agitation, and having a cup above which communi-
cates with the bulb through the upper stopcock; a second globe-
shaped reservoir (c), to which, by means of a glass multiple connect-
ing tube and rubber tubing, are joined a compensating burette (d), a
reading burette (e), and an additional measuring burette(f). The read-
ing and compensating burettes are of the same shape and size, and
a The description has been taken in a large part from a paper by J. R. Pitman on The analysis of nitric
and mixed acids by du Pont's modification of the Lunge nitrometer, Jour. Soc. Chem. Ind., vol. 19, 1900,
p. 983; see also Lunge, G., Du Pont's nitrometer, Jour. Soc. Chem. Ind., vol. 20, 1901, p. 100.
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Snelling, Walter O. & Storm, C. G. The Analysis of Black Powder and Dynamite, report, 1913; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc12847/m1/39/: accessed May 5, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.