As to the powder, of which there was about fifty pounds in the barrel, a small supply of it had to be taken, but the engineer hoped to manufacture an explosive substance which would allow them to husband it.
Quant à la poudre, dont les barils renfermaient environ cinquante livres, il fallut bien en emporter une certaine provision, mais l'ingénieur comptait fabriquer une substance explosive qui permettrait de la ménager.