Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 1-7

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 8-33

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 34-50

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 51-64

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 65-66

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 67-68

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 69-71

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 72-89

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 90-110

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 111-118

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 191, pages 119-128

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 129-141

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 142-165

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 166-176

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 177-188

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 189-193

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 194-234

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 235-258

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 259-302

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 303-312

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 192, pages 313-318

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 193, pages 319-353

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 193, pages 354-369

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 193, pages 370-459

Published in Proceedings of The American Philosophical Society, in 1909, in volume 48, issue 193, pages 460-462