Published in Proc. Acad. nat. Sci., Philadelphia, in 1848, in volume 1848, pages 184
Published in Proc. Acad. nat. Sci., Philadelphia, in 1848, in volume 1848, pages 59-61
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 116-120
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 35-36
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 109-110
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 70-72
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 236-239
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 69
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 65
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 52-56
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 263-270
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 234-236
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 76
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 4-6
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 205-208
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 169
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 137-138
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 241
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 145-147
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 249-260
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1848, in volume 4, pages 84-85