. Annual report for the year ended June 30 .... United States National Museum. EXHIBITS 21. Exhibits designer Robert A. Widder and exhibits specialist Nadya KayalofF use a model to study placement of exhibits in a hall dealing with the growth of the United States, in the Museum of History and Technology. reproduction of the De Dondi clock, earliest known meclianical clock about which details have survived, will be one of the feature exhibits in this hall, for which associate curator Edwin A, Battison has speci- fied the contents and Barbara Bowes provided the graphic designs. Production was co
. Annual report for the year ended June 30 .... United States National Museum. EXHIBITS 21. Exhibits designer Robert A. Widder and exhibits specialist Nadya KayalofF use a model to study placement of exhibits in a hall dealing with the growth of the United States, in the Museum of History and Technology. reproduction of the De Dondi clock, earliest known meclianical clock about which details have survived, will be one of the feature exhibits in this hall, for which associate curator Edwin A, Battison has speci- fied the contents and Barbara Bowes provided the graphic designs. Production was continued on the exhibits for the hall of civil engineering, and 42 units have thus far been completed, including 8 scale models illustrating the historic development of methods of soft- ground and hard-rock tumieling in Europe and America. Designer Harry Hart completed the graphic design of other exhibits in the section of tunneling. Associate curator Robert M. Vogel continued to prepare specifications for the models illustrating the history of bridge construction, and he also wrote a detailed script for the refrigeration section of the hall of heavy machinery, which will fea- ture a number of demonstrations of the principally employed refrig- eration cycles, as well as examples of refrigeration Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum. [Washington] : Smithsonian Institution
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