This picture is based upon a photograph of a painting which has won great fame during recent years. The artist has represented Pasteur, the celebrated scientist, busily at work in his laboratory, recording the results of his microscopal study of bacteria. As the great master of modern science rests for a moment from his midnight researches, he appears to see in a vision the victims of pestilence, famine, and infectious diseases imploring relief from the good angel who symbolizes the wonderful victories won by Pasteur in combating disease. - Blaisedell, 1904