Figure 22. — Hearing-aid exhibit designed in 1962. It includes otologist Julius Lempert's 

 personal memorabilia and original surgical instruments used in the fenestration operation 

 for restoring hearing. (Smithsonian photo 49345-C.) 



2. The Hail 01 Medicine and Dentistry will 

 depict the history of these two sciences with exhibits 

 of the equipment used through the centuries. In 

 the medical field, early trephining and other surgical 

 instruments will be displayed along with a diorama 

 of an 1805 surgical operation performed by Dr. 

 Philip Syng Physick in the amphitheater of the 

 Pennsylvania Hospital. Diagnostic instruments such 

 as stethoscopes, endoscopes, speculums, and blood- 

 pressure measuring devices will be exhibited with 

 a series of microscopes illustrating the develop- 

 ment of these instruments. Exhibits of original 

 galvanometers and other apparatus will trace the 

 development of cardiography. The early use of 



anesthesia will be shown by apparatus of William 

 Morton and Crawford W. Long. American pio- 

 neers in this field. The development of the devices 

 of modern medicine and surgery will be shown by 

 exhibits of the iron lung and x-ray tubes, including 

 a tube used by W. K. Roentgen. Medicine chests 

 and surgical kits of different periods will graphically 

 summarize the state of medical science in the period 

 each represents. 



Exhibits on the development of dentistry and 

 dental surgery will display examples of tooth-filling 

 and extracting tools, drilling apparatus from the 

 earl) hand and foot engines to the first ultrasonic 

 cutting instrument (1954), and the original contra- 



294 



111 111 iin 24n : contributions from tiik misecm of history and technology 



