Chemist measuring the temperature of the contents of a beaker, [s.d.]

Photograph of a chemist measuring the temperature of the contents of a beaker, [s.d.]. A man stands at left and is handling a thermometer placed in a glass beaker at right. The beaker rests on a ring stand over a Bunsen burner. The man is wearing a dark vest, matching slacks, a light-colored striped shirt and a spotted tie. He is mostly bald, with dark hair around the side of his head. In the background, several unidentified bottles rest on wooden shelves in front of a brick wall.

本照片无确切拍摄日期（[s.d.]），记录了一名化学家测量烧杯内溶液温度的实验场景。画面左侧站有一名男子，正操作置于右侧玻璃烧杯中的温度计。该烧杯架于铁架台（ring stand）的圆环支架上，下方配有本生灯（Bunsen burner）。该男子身着深色马甲与配套西裤，内搭浅色条纹衬衫，系有斑点花纹领带；其头顶大部分区域光秃，仅两侧留有深色发丝。背景中，砖墙前方的木质搁架上摆放着若干未标识的试剂瓶。