[Dr. Charles G. Abbot (right), Secretary of the Smithsonian Institute, with his solar heat engine that was shown at the Third World Power Conference on September 8, 1936, with Dr. William S. Durand, chairman of the conference] [graphic].

[Dr. Charles G. Abbot (right), Secretary of the Smithsonian Institute, with his solar heat engine that was shown at the Third World Power Conference on September 8, 1936, with Dr. William S. Durand, chairman of the conference] [graphic]. Harris & Ewing, photographer. still image Glass negatives. gmgpc [1936 September] eng Title devised by Library staff. (Source: Flickr Commons project, 2020). On negative sleeve: Chas. Albert [...] are parents of railroad in his [...] of Durant. Date based on date of negatives in same range. The demonstration was unsuccessful as the heat melted the solder holding some of the parts together. Harris & Ewing, Inc. General information about the Harris & Ewing Collection is available at Smithsonian Institution. United States. Harris & Ewing photograph collection http://hdl.loc.gov/loc.pnp/hec.33725 No known restrictions on publication. For more information, see Harris & Ewing Photographs - Rights and Restrictions Information