Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 1-14

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 15-32

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 33-52

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 53-64

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 65-79

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 80-98

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 99-106

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 107-116

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 117-122

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 123-135

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 136-150

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 151-166

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 167-183

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 184-203

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 204-211

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 212-226

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 227-236

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 237-245

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 247-271

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 272-282

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 283-285

Published in Proceedings of The American Philosophical Society, in 1922, in volume 61, issue 220, pages 286-288