THE ROYAL ARTILLERY INSTITUTION. 
79 
the furnace. He should furnish him also with the documents required for 
the compilation of the journal of the foundry. 
Art. 31. The government foreman will keep, under the eye of the officer 
charged with the inspection of the furnace, a register, in which he will insert 
the day and hour when the metal is run; the number and composition of 
the fillings of the furnace; the number of the mixture; the qualities of ores, 
charcoal, and flux employed; the product obtained; the mean pressure of 
wind at the nozzle of the bellows between two consecutive foundings; the 
diameter of the nozzle; the numbers of the pigs which have been run; the 
opinion passed upon the quality and the temperature of the metal; the 
accidents which may have happened, either to persons, to furnaces, or to 
blowing machines; in short, he will mention whatever may be calculated to 
furnish useful information as to the castings, at a subsequent period. 
Section III .—Classification and passing of metal. 
Art. 32. The metal will be placed separately in the yards {parterres) 
according to its origin. That which has the same origin will be divided into 
as many varieties {nuances)* as its physical character will permit to be 
established. 
Art. 33. The classification of metal produced in the smelting furnaces of 
the foundries will be made at the same time for a considerable quantity of 
pigs of iron, once or twice a month at most. The classification of metal 
from the trade will be made on delivery, after its definitive acceptance. 
Every time that the metal is run the standard pig will be broken, in order 
to judge of the working of the furnace. 
Art. 34. The various shades of metal of the first fusion will continue to 
be designated by the denominations long used in the establishment. They 
will receive, in addition, a number shewing their order. No. 1 will be the 
greyest shade. The metal of the second fusion will receive the same 
numbers as those of the first fusion, to which they can be assimilated; or 
higher numbers, if the assimilation is not possible. 
Art. 35. The metal of the second fusion will be classed according to the 
aspect of their fracture, comparing them as much as possible with metal of 
the same sort already classified. 
Art. 36. The classification of the metal will be the care of the officer 
charged with the inspection of the smelting furnace, assisted by the govern¬ 
ment foreman and the master-founder. This classification will not be definitive 
till it has received the approbation of the director. 
Art. 37. The metal which is bought at the works of the trade will be 
chosen by the director or the officers he may delegate, keeping clear of 
extreme shades ( nuance ) and textures, which ought not to be admitted in 
the manufacture of guns. 
Art. 38. The metal to be passed should be of one founding, and pro¬ 
duced from the same ores. Every lot should be of at least 80,000 kilo¬ 
grammes (176,800 lbs.) This lot on delivery will be proved. In case the 
total delivery should be more considerable, proof should be taken on every 
100,000 kilos. (221,000 lbs.) at the most. 
* Nuance, shade: as white, grey, mottled, but used to include all other physical distinctions. 
