Published in Philadelphia Proceedings of the American Philosophical Society, in 1917, in volume 56, pages 690-703

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 1-43

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 44-52

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 53-151

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 152-160

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 161-167

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 275-280

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 281-288

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 289-352

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 353-363

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 364-368

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 369-402

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 410-415

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 416-436

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 437-444

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 445-472

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 473-483

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 484-486

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 487-588

Published in Proceedings of The American Philosophical Society, in 1917, in volume 56, issue 220, pages 589-672