Testing thermometers. Several thermometers are being analysed simultaneously using laboratory testing equipment. The thermometers (centre) are arranged in a circular cage and lowered into an electrically heated water bath. The readings from these are then compared with the standard laboratory thermometer. Photographed at the National Physical Laboratory,Teddington,UK,in 1918 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NATIONAL PHYSICAL LABORATORY (c) CROWN COPYRIGHT |
Bildgröße: | 3559 px × 4893 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |