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SPITTOON - This image is part of the waste pipe attachment on the spittoon from a Ritter dental unit. This iconic piece of equipment from the 1920s grouped together for the first time all the operating essentials in a single unit. This enabled the dentist to have all the equipment he needed close to hand. The unit from the Ritter Dental Manufacturing Company of New York was a direct competitor of the equally popular British-made Rathbone Unit. Ritter units were initially more expensive but new factories in Germany soon made the units more competitively priced. (Photographed at the BDA Museum by Filip Gierlinski. www.filskifoto.com)