UPDATE: The photo now has a caption.

October 1, 1929. The new crack train from Washington to Boston was inspected today by members of the Massachusetts State Society. Harry Carr of the Pennsylvania R.R. was host. Left to right: Wm. T. Simpson, Treasurer; Frank E. Hicks, Vice Pres.; Mrs. Proctor L. Daugherty; Geo. R. Farnum, Pres. and Assistant Attorney General of the United States; Geo. A. Hornan, Secretary; and Chas. A. Bauman.

Circa 1929 at Washington's Union Station, it's the Senator. Which senator, maybe someone out there knows. Unlabeled Harris & Ewing glass plate. View full size.

UPDATE: Our subject is Dr. James Harris Rogers (1856-1929) of Hyattsville, Md., inventor of the "loop aerial" and holder of numerous patents in telegraphy, telephony and radio:

August 16, 1929. A Veteran Inventor. About 6 miles from Washington, on the edge of the little hamlet of Hyattsville, Md., may be found Dr. James Harris Rogers, wizard inventor, now 80 years old, retired from his work but still erect and energetic. It was Dr. Rogers who during the war proved that water as well as earth and air is a medium for the transmission of electro-magnetic waves. Through the "well" located on his property, high officials heard German official reports.

Radio apparatus and unidentified operator circa 1930 in this unlabeled Harris & Ewing plate. Who can help us fill in the blanks? View full size.

Circa 1898. "Boys of the 71st N.Y. at Montauk Point after returning from Cuba." Young veterans of the Spanish-American War. Next stop: The Klondike! 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

November 19, 1917. New York. "Frances White." A singer of brief renown (for "The Spelling Song"), Frances, seen here at age 19, was half of the vaudeville team Rock & White. Bain News Service glass negative. View full size.

Hampton Roads, Virginia, circa 1900. "Going to the landing stage. Hotel Chamberlin in background." Although the harbor might not be mined, the street is. 8x10 inch glass negative, Detroit Photographic Company. View full size.

Washington, D.C., circa 1925. "House at 604 H Street N.W., at which plot to assassinate Lincoln was hatched." National Photo Co. View full size.

Circa 1922, the Fiske Reading Machine in the hand of its inventor, Rear Admiral Bradley Fiske. Where's the Home button on this thing? View full size.