Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 7-17

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 53-66

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 67-74

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 75-112

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 121-124

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 125-160

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 161-168

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 169-176

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 177-184

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 185-188

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 207-232

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 233-235

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 236-242

Published in Transactions of the South African Philosophical Society, in 1900, in volume 11, issue 1, pages 348-382