A treatise on electrical theory and the problem of the universe. Considered from the physical point of view, with mathematical appendices Q Science
A tribute to the memory of Peter Collinson. With some notice of Dr. Darlington’s Memorials of John Bartram and Humphry Marshall Q Science
Friends in feathers; character studies of native American birds which, through friendly advances, I induced to pose for me, or succeeded in photographing by good fortune, with the story of my experiences in obtaining their pictures Q Science
