What science based sets were sold at the department store headquarted in Washington D.C. and founded in 1887?
Porter Chemical Company:  The company's "Chemcraft" kits were first sold at major retail by Woodward & Lothrop, and appeared soon after at other retailers in the country. Woodward &amp; Lothrop: Woodward & Lothrop was a department store chain headquartered in Washington, D.C. Woodward & Lothrop was Washington, D.C.'s first department store, opening in 1887.
Chemcraft