Samuel Howard Mosell :: A system of instruction in X-ray methods and medical uses of light, hot-air, vibration and high-frequency currents: a pictorial system of teaching by clinical instruction plates with explanatory text: a series of photographic clinics in standard uses of scientific therapeutic apparatus for surgical and medical practitioners: prepared especially for the post-graduate home study of surgeons, general physicians, dentists, dermatologists and specialists in the treatment of chronic diseases, and sanitarium practicer: 1902 (1900’s)

Subjects: Vibration X-rays Diagnosis, Radioscopic Thermotherapy Electrotherapeutics X-Ray Therapy Vibration Diagnosis

Publisher: New York : E.R. Pelton

Contributing Library: Francis A. Countway Library of Medicine

Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

Langley’s First Wind Tunnel, ca. 1920
The honeycombed, screened
center of this open-circuit air intake for Langley’s first wind tunnel
insured a steady, non-turbulent flow of air. Two mechanics pose near the
entrance end of the actual tunnel, where air was pulled into the test
section through a honeycomb arrangement to smoothen the flow.
Courtesy NASA Langley Research Center
/ via
furtho / source: monovisions