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[[illustrated page]] Planche 15 Des Effets de la poudre [[figure 1]] fig: 1e A [[located at top of figure]] [[/figure 1]] [[figure 2]] fig: 2e B [[located at top of figure]] [[/figure 2]] [[figure 3]] fig: 3e A B C [[figure parts labeled A, B, C]] [[/figure 3]] [[figure 4]] fig: 4 E F G [[figure parts labeled E, F, G]] [[/figure 4]] [[figure 5]] 5 Moÿen simple de mesurer la distance de l'ouverture de la tranche ou chemin couvert A Prolongem de la Capitale B E c F D [[figure parts labeled A, B, C, D, E, F]] [[/figure 5]]