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"Benjamin Garver Lamme (12 January 1864 – 8 July 1924) was an electrical engineer and chief engineer at Westinghouse, where he was responsible for the design of electrical power machines. Lamme was the principal engineer who built the giant Niagara Falls generators and motors designed by Nikola Tesla, and the power plant of the Manhattan Elevated Railway in New York City." en.wikipedia.org/wiki/Benjamin_G._Lamme He was a member of the Naval Consulting Board (aka Naval Advisory Board, en.wikipedia.org/wiki/Naval_Consulting_Board), see e.g. The sun., October 10, 1915, SEVENTH SECTION, Image 58

The same man:


Other members of the Board see under

B-59: Thanks for the further information on Lamme. We will add more to this record when we update.

This is likely Major Richard Sylvester (1859-1930), Chief of Police of Washington, DC. "Sylvester was harshly criticized by leaders in the woman's suffrage movement, and others, for the failure of the police to protect participants in the March, 1913, Washington woman's suffrage parade from the crowds on Pennsylvania Avenue." –New York Times Sylvester was the first president of the International Association of Chiefs of Police (IACP), and "was widely regarded as the father of police professionalism. He advocated a citizen-soldier model, and was responsible for development of the many paramilitary aspects of policing." He coined the phrase "the third degree" in the context of interrogation.

I started a Wikipedia entry: en.wikipedia.org/wiki/Richard_Sylvester

Pixel Wrangler: Thanks for the additional information about Sylvester. We'll add his full name and occupation to the description next time we update.

See comment under

Though the date on the negative is July, 1918, it is from the same session as the photo in B-59's comment, dated April, 1916.