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Italian Method Orienting [Pllbox?]

1st draw little a + b then sight B along a. b. clamp the board then from a sight C: then draw a, C, =u in clamp board + rotate until along b, a, you sight A, clamp board. From b sight C + draw the line which is [illegible] The intersection of m + n' is point y. draw y, c, then along y,c, sight C + board is oriented.