located within the proposed listing curtilage. The main workshop houses machinery typical of engineering workshops from the 1940s and 1950s and includes a large number of lathes and other tools and is largely intact. This workshop also houses the partly completed planetarium instrument and clock. The planetarium is the only one to be designed and constructed in Australia. Similar optical star projecting systems located in Australia such as the HV McKay Planetarium in Melbourne and the Launceston Planetarium were imported from Ziess in Germany in the early to mid 1960s. Beams' planetarium although based on the Zeiss design was developed from first principles to allow Mr Beams to incorporate what he considered to be design improvements on the Zeiss model. Within the listing curtilage is located a modern 30 inch (762 mm) reflecting telescope housed in a sliding roof building, constructed around 2002 and Beams' house underneath which are located the mould and other accessories used in the design and construction of the telescope and observatory. Condition The historic telescope is in good mechanical and optical condition – the mirrors were re-aluminised by Mt Stromlo Observatory as a gift to Ken Beames. The custom electrical equipment built by Beames has failed and parts are no longer available. Machinery in workshops shows signs of disuse, but is probably serviceable. Drawings, documents and notebooks are degrading and in need of conservation. Other artefacts are in a variety of conditions ranging from poor and in need of conservation, through to excellent, depending on age and storage. The collection of tools, machinery, dies, jigs, patterns, notebooks and drawings and other material associated with the construction of the telescope and other works by Beames has a very high degree of integrity in terms of the completeness of the collection, the variety of skill applications it represents, and the overall condition. Modifications and dates Alterations made to power the dome and telescope drive by Beames in the 1980s to work around failure of some sub-systems. New 3 phase sub-main installed in dome following lightning damage to old board in 2008. 30 inch (762 mm) reflector installed in separate building in 2002 for public access and observations. 8 inch (200 mm) and 12 inch (300 mm) mm reflecting telescopes purchased in 2005 and 2007 to assist public access viewing and education. The original storeroom was lost in the 1977 bushfires and rebuilt in 1978. Further information Ken