University of Bristol - Historical Photographs of China reference number: PC27-297. A group photograph of mine workers (explosives team), with their kit, at the Tongshan colliery. There are two European foremen standing at the sides. In the picture can be seen a wooden case marked ‘SIEMENS EXPLODER’, which was described in detail by Kinder in a paper entitled ‘Notes on Electric Blasting in China’, published in Volume LXXX of the Proceedings of the Institution of Civil Engineers. Another wooden case is labelled TENSION.
Black and white photograph