Researches on Cellulose, 1895-1900Cross, C. F. (Charles Frederick)
Science
Researches on Cellulose, 1895-1900
Cross, C. F. (Charles Frederick)
Cellulose
1895. p. 29 Various Indian Fibres--more particularly Sida.
118 (a) Fibres from Victoria; (b) Special Analyses of
(a) Samples of Jute; (c) Paper-making Fibres
from S. Australia.
202 Fibres from Victoria.
287 Fibres from Victoria.
366 Sisal from Trinidad.
373 Rope-fibres from Grenada.
(b) 398 Report of Experiments on Indian Jute (1).
435} Fifth and Sixth Report on Australian Fibres.
473}
1896. 68 Hibiscus and Abroma Fibres.
104-5 Hibiscus, Urena, and Crotalaria Fibres.
141 Indian Sisal
(c) 182-3 Report of Experiments on Indian Jute (2).
264 Sanseviera from Assam.
From the above we may draw the general conclusion that the scheme of
investigation has been found in practice to answer its main purpose,
viz. to afford such numerical constants as determine industrial values.
In illustration we may cite (a) the results of analyses of specially
selected samples of jute, from which it will be seen that there is a
close concordance of value as ordinarily determined from external
appearance, with the chemical constants as determined in the laboratory.
__________________________________________________________________
| | |
| | Quality of Jute |
|____________________________|_____________________________________|
| | | | | |
| | Low | Medium | Extra | Extra Fine |
|____________________________|_______|________|_______|____________|
| | | | | |
| Moisture | 11.0 | 10.4 | 11.1 | 9.6 |
| Ash | 0.87 | 2.8 | 1.0 | 0.7 |
| Alkaline hydrolysis (a) | | | | |
| 5 mins. boiling | 13.2 | 11.6 | 8.5 | 9.1 |
| Alkaline hydrolysis (b) | | | | |
| 60 mins. boiling | 16.1 | 17.5 | 12.5 | 13.1 |
| Mercerising treatment | 9.2 | 10.5 | 10.3 | 8.5 |
| Nitration (increase p.ct.) | 36.6 | 35.7 | 37.5 | 36.7 |
| Cellulose (yield) | 71.4 | 70.0 | 79.0 | 77.7 |
| Acid purification | 2.6 | 1.3 | 1.9 | 2.0 |
|____________________________|_______|________|_______|____________|
A useful series of experiments, initiated by the Institute, is that
noted under (b) and (c) above.
Public-domain text, read in full here on John Shaqi.
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