Background
Ray, David Heydorn was born on July 14, 1878 in New York City. Son of Martin Hasset and Caroline (Heydorn) Ray.
Ray, David Heydorn was born on July 14, 1878 in New York City. Son of Martin Hasset and Caroline (Heydorn) Ray.
Bachelor of Arts, College City New York, 1897. Bachelor of Science, Columbia, 1901, Master of Arts, 1902. Civil Engineer, New York University, 1902, Doctor of Science, 1908.
Studied abroad, 1898, 1905, 1908.
1 son, South. David Tryon. Married second, Florence A. Grasmuk, August 20, 1941. Engineer, New York Institution Blind and New York Rapid Transit Subway, 1902.
Examining engineer Municipal Civil Service Commission New York City 1902-1904.
Instructor physics and engineering, College City New York, 1905-1910. Chief engineer Bureau buildings, New York City, 1910-1912.
United States appraisal officer New York District, 1918-1919. Professor mechanics California Institute Technology, 1919-1920.
Structural engineer Bureau buildings, Los Angeles, 1923-1927.
Examining engineer Civil Service Commission, Los Angeles, 1927, also special examiner in engineering Civil Services Commission Los Angeles, 1933. Assistant mechanic engineer Bureau Power and Light, Los Angeles, 1936. Senior structural engineer State Department Public Works, 1933.
Director laboratory United States Signal Corps School, New York, 1917-1918.
Captain inspector general Reserve. Served in New York Neuropsychology Group 7 years captain engineer corporations Secretary Planning Commission, High School Board (both Arcadia, California).
Member District School Board, Queens and Manhattan, New York City. Fellow of the American Association for the Advancement of Science, American Geography Society. Member American Society of Mechanical Engineers.
Married Sara Beecher, June 25, 1908 (died April. Married second, Florence A. Grasmuk, August 20, 1941.