the Chemistry and Geology departments of the Brisbane Central Technical College. The building underwent alterations and additions in 1932, 1937, 1960s and 1990 and is now a U-shaped four-storey building with a southern wing. In 1932 alterations were undertaken to accommodate the Commercial High School; the northeast corner was added in 1937; an additional corner to the southwest and a third storey were constructed during the 1960s to accommodate classes for art and pharmacy; a fourth storey was added in 1990. Description Block E is located to the south of the courtyard between Blocks B and G/H. Now four storeys, it has grown out of the former Chemistry and Geology building and is unified with the other buildings in the group in general elevational composition, detailing and materials. It is a plain building in light red facebrick with contrasting dark red facebrick to the relieved quoins, flat window arches and banding marking the interior floor levels. The only decoration is the Art Nouveau metal lettering "Chemistry" above the arched entrance porch to the east. The 1937 infill to the northeast continues the original elevational treatments and is well matched to the original while the 1960s addition to the southwest corner in light brick with no texturing or banding and smaller vertical fenestration is less sympathetic. The solid balustraded, setback upper-storey (1990) contrasts with the rest of the building and disturbs the building's cohesion with the group. A barrel-shaped, corrugated metal hood has been added over the steps to the east entrance porch. The interior has been altered and is now a range of laboratories, lecture theatres, staff offices and ancillary service/storage/work areas arranged off the main east-west corridor of the original master plan. There are concrete stairs at each end. Some early fabric survives including the concrete stair with plain metal balustrading to the east, some joinery and stop chamfered concrete beams and posts to the ground floor. The interior walls are painted or plastered brick, with plain plastered ceilings and concrete floors (some with vinyl and carpet floor coverings). Suspended ceilings conceal plaster ceilings. Wool-classing and Building Construction (F Block) Constructed: 1911-1914 Architect: T. Pye History Opened in 1915 to accommodate classes for wool-classing, building construction and botany this two-storey building has a tough and distinctive industrial character. With the dedication of purpose-built classing facilities for the training of wool classers, the building demonstrates the importance of the wool