The sixth solar house, the Dover Sun House, was different from the others. Sponsored by Boston heiress and sculptress Amelia Peabody, the house heating unit was designed by Dr. Maria Telkes, an assistant in MIT’s Department of Metallurgy, and instead of water, the heating storage device was Glauber salts (sodium sulfate decahydrate). Architect Eleanor Raymond drew up the plans for the five-room house and a cousin of Dr. Telkes lived in the house with his wife and child for three years, at which point the system failed.