Scale: Unknown. A sectional model of a dock at Malta showing an iron sliding cassion used for forming a double dock. The model is largely made of wood, with the dock structure finished in a light sandy colour, and a single sheet of glass to indicate water level. The cassion itself is built from wood and card, and has been painted a light brown colour and has been annotated with various components including a water tank chamber above the water level and an air chamber below. The top part of the cassion has been decked with wooden planks, together with a pair of inspection hatches, the details of which are inked on paper and glued to the wooden structure. At either end of the cassion it has been sectioned diagonally to show the internal construction, comprising of five layers. The whole model is mounted on wooden baseboard with varnished, polished and moulded mahogany edging.