A circular apparatus, slotted to accept a weave of fabric and fitted with an outer covering, is placed over a reclining patient's nose and mouth; ether is being admininstered from a bottle, a few drops at a time onto the fabric.
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Is part of: Artificial anaesthesia, a manual of anaesthetic agents ... employment in the treatment of disease, p. 161, pl. 32.; See related catalog record: 66950750R