A perceptive exploration of early blast furnaces in the Salisbury Ore District where Massachusetts, Connecticut, and New York converge, conducted alone during the summer of 1951 by one woman who satisfied a scientific need to find out. It becomes an adventure story. Her account of the summer-long search for these early furnaces makes a good read. And she is a good writer, attentive to appropriate nouns, careful to avoid repetition, sensitive to dialogue.