Labels:book | bulletin board | dish rack | earth | grass | paper | plaything | rock | sky | tree OCR: MORTAR PLATFORMS Fig. 18. SIEGE MORTAR PLATFORM. BILL OF MATERIAL USED. Tim bers 61/2 ft Long in by 12 in Plank 6/2 ft Long in. by inch Spikes Scaler5. feet to inch Fig. 19. 10 INCH SEA COAST MORTAR PLATFORM BILL OF MATERIAL U.SED. Timbers 61/2 Long, in. by in. 61/2 Plank Long, in. by in. Deck Plank 31/2 in by Timbers Long by 10/2 in. in. and 104 Spikes, PLATEORM ikes Scater5
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