Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 208, pages 1-20

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 208, pages 21-30

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 208, pages 31-162

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 163-174

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 175-183

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 184-200

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 201-205

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 206-225

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 226-233

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 234-242

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 243-256

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 257-275

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 276-282

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 209, pages 283-286

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 210, pages 287-390

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 210, pages 397-406

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 210, pages 407-419

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 210, pages 420-430

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 211, pages 431-466

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 211, pages 467-487

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 211, pages 488-494

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 211, pages 495-515

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 211, pages 516-542

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 211, pages 543-557

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 212, pages 606-615

Published in Proceedings of The American Philosophical Society, in 1913, in volume 52, issue 212, pages 616-650