Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 17-29

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 31-40

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 41-48

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 111-112

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 113-126

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 127-176

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 177-200

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 213-226

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 252-255

Published in Transactions of The American Microscopical Society, in 1900, in volume 21, pages 257-264