THE ROYAL ARTILLERY INSTITUTION. 
77 
Section II .—On the management of smelting furnaces and foundries. 
Art. 9. In the treatment of ores, charcoal should be used as much as 
possible which is made from young wood of a good sort and of a moderate 
size. The charcoal should be sent to the foundry as soon as possible after 
it has been burnt, but it must not be placed for use until twenty-four hours 
after its arrival. 
Art. 10. No mixture of ores intended for the manufacture of metal for 
guns can be definitively used until the metal produced has been submitted to 
the extraordinary proof. If in the course of founding it is found necessary 
to modify a mixture which has been adopted, the director will make his 
report to the minister as to the advantage of a fresh proof. 
Art. 11. The definitive passing of ores will take place at the foundry. 
Still the director may, if he thinks right, send to the place of their extrac¬ 
tion, or to their depot, an officer of artillery or other agent of the establish¬ 
ment, in order that he may ascertain the source of the ores, and that he may 
assure himself as far as possible that they are the sorts and qualities 
acknowledged proper for the manufacture of guns. 
In case of need an agent should be kept on the spot and charged to the 
department of marine. 
Art. 12. The director will watch with the greatest attention that the 
different ores be not mixed, neither in the depots nor during transport, nor 
in the yards of the establishment, where each sort should be placed separately 
and distinguished by a label bearing the name of the lode or vein from where 
it has come. 
Art. 13. In each foundry a special registry will be kept of the situation 
of the ores of different sorts. This registry will be balanced every month. 
Art. 14. A paved space will be reserved, on which the ores will be mixed 
in the proportion they will have to each other in the furnace. 
Art. 15. The charcoal, ore, and flux with which the furnace is charged, 
will be the first measured and the two last separately weighed. 
Art. 16. A covered space will be left near the mouth of the furnace, large 
enough to hold the quantity of mixed ores and flux necessary for twenty-four 
hours at the least, and the charcoal sufficient for the night work. This last 
will be prepared in advance, during the day. 
Art. 17. The quantity of charcoal put into the furnace at a time will be 
the same throughout. This quantity will be fixed at the commencement of 
the founding and will be continued throughout. 
Art. 18. No sudden change should be made if it can be avoided in the 
charge of ore or flux; but if the working of the furnaces requires that 
either one or the other be altered to any material extent, the metal run sub¬ 
sequently will not be classed as fit for the making of guns, during the whole 
time the derangement lasts. 
Art. 19. Each time that the metal is run from the smelting furnace a 
standard pig will be made in a mould dried in the stove; its fracture will 
serve for the classification of all the pigs run at the same time. 
Art.‘20. In his reports on the furnaces, each month, the director will 
acquaint the minister with the changes which have been made, as well as with 
the causes of them. He will also specify the number and weight of the pigs 
produced during the abnormal working of the smelting furnace. 
