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Article THE FREEMASONS' REPOSITORY. ← Page 5 of 5 Article SCIENTIFIC INTELLIGENCE. Page 1 of 3 →
Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
The Freemasons' Repository.
PRAYER . AT THE OPENING OF THE CHAPTER , AND DEDICATION OF THE WARRANT . O ! thou eternal Word * who makest men to be of one mind in one house , and dost look down with pleasure on those who dwell together in unity , pour down the dew of thy blessing on this Chapter here assembled , and grant the members may truly and religiously perform their various bounden duties , and sacredly comply with the obligations of this institution , through Jesus Christ . Amen .
Scientific Intelligence.
SCIENTIFIC INTELLIGENCE .
CHEMISTRY . METHOD 0 „ F RESTORING THE ORIGINAL COLOUR TO OLD OR . DIRTYPRINTS , BOOKS , & C . BY M . CHAPTAL . SIMPLE immersion in oxygenated muriatic acid , letting the article remain in it . a longer or shorter space of time , according to the strength of the liquid , will be sufficient to whiten an engraving . If it be required to whiten
the paper of a bound book , as it is necessary that all the leaves should be moistened by the acid , care must be taken to open the book well , and to make the boards reft on the edge of the vessel , in such a manner that the paper alone be dipped in the liquid : the leaves must be separated from each other , in order that they be equally moistened on both sides . The liquor assumes -a yellow tint , and the paper becomes white in the same pioportion . At the end of two or three hours the book may be taken
from the acid liquor and plunged into pure water , with the same care and precaution as recommended in regard to the acid liquor , that the water may exactly touch the two surfaces of each leaf . The water must be renewed every hour to extract the acid remaining in the paper , and to dissipate the disagreeable smell .
Or a better method is by unsewing the book and separating it into leaves , which are then placed in cases formed in a leaden tub , with very thin slips of wood or glass , so that the leaves when laid flat are separated from each other by intervals scarcely sensible . The acid is then poured in , making it fall on the sides of the tub , in order that the leaves may not be deranged by its motion . When the workman judges , by the whiteness of" the paper , that it has been sufficiently acted upon b y the acid , it is drawn off by a cock at the
bottom of the tub , and its place is supplied by clear , fresh water , which weakens and carries off the remains of the acid , as well as the strong smell . The leaves are then to be dried , and , after being pressed , may be again bound up . The leaves maybe placed also veitically in the tub ; and this position seems to possess some advantage , as they will then be less liable to be torn . With this view I constructed a wooden frame , which I adjusted to the proper height , according to the size of the leaves which I wished to whiten . This
Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
The Freemasons' Repository.
PRAYER . AT THE OPENING OF THE CHAPTER , AND DEDICATION OF THE WARRANT . O ! thou eternal Word * who makest men to be of one mind in one house , and dost look down with pleasure on those who dwell together in unity , pour down the dew of thy blessing on this Chapter here assembled , and grant the members may truly and religiously perform their various bounden duties , and sacredly comply with the obligations of this institution , through Jesus Christ . Amen .
Scientific Intelligence.
SCIENTIFIC INTELLIGENCE .
CHEMISTRY . METHOD 0 „ F RESTORING THE ORIGINAL COLOUR TO OLD OR . DIRTYPRINTS , BOOKS , & C . BY M . CHAPTAL . SIMPLE immersion in oxygenated muriatic acid , letting the article remain in it . a longer or shorter space of time , according to the strength of the liquid , will be sufficient to whiten an engraving . If it be required to whiten
the paper of a bound book , as it is necessary that all the leaves should be moistened by the acid , care must be taken to open the book well , and to make the boards reft on the edge of the vessel , in such a manner that the paper alone be dipped in the liquid : the leaves must be separated from each other , in order that they be equally moistened on both sides . The liquor assumes -a yellow tint , and the paper becomes white in the same pioportion . At the end of two or three hours the book may be taken
from the acid liquor and plunged into pure water , with the same care and precaution as recommended in regard to the acid liquor , that the water may exactly touch the two surfaces of each leaf . The water must be renewed every hour to extract the acid remaining in the paper , and to dissipate the disagreeable smell .
Or a better method is by unsewing the book and separating it into leaves , which are then placed in cases formed in a leaden tub , with very thin slips of wood or glass , so that the leaves when laid flat are separated from each other by intervals scarcely sensible . The acid is then poured in , making it fall on the sides of the tub , in order that the leaves may not be deranged by its motion . When the workman judges , by the whiteness of" the paper , that it has been sufficiently acted upon b y the acid , it is drawn off by a cock at the
bottom of the tub , and its place is supplied by clear , fresh water , which weakens and carries off the remains of the acid , as well as the strong smell . The leaves are then to be dried , and , after being pressed , may be again bound up . The leaves maybe placed also veitically in the tub ; and this position seems to possess some advantage , as they will then be less liable to be torn . With this view I constructed a wooden frame , which I adjusted to the proper height , according to the size of the leaves which I wished to whiten . This