Experimental room and observatory The observatory and other buildings and scientifica apparatus; Accounts, vouchers, receipts and correspondence relating to the fittings and apparatus mainly for the experimental room, observatory at Marischal College. The receipts show purchases of equipment, repairs to equipment and maintenance. A large proportion of the material relates to Patrick Copland. The material also contains some more general accounts for the experimental room and annual spending on apparatus. There are a small number of vouchers relating to repairs/alterations of the observatory and the camera obscura. Requires full listing. 1695 - 1825