Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 6-8

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 21-22

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 43-47

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 53-55

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 55

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 63

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 65

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 69

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 75-76

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 77-81

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 82

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 87-88

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 88-90

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 91-93

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 94

Published in Journal of the Academy of Natural Sciences, Philadelphia, in 1844, in volume 2, pages 98-118

Published in Proc. Acad. Nat. Sci. Philad., in 1844, in volume 2, pages 118-120

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1844, in volume 2, pages 127-130

Published in Proc. Acad. Nat. Sci. Philad., in 1844, in volume 1841, pages 111-115

Published in Proc. Acad. nat. Sci. Philad., in 1844, in volume 1844, pages 58-62

Published in Proc. Acad. Nat. Sci. Philad., in 1844, in volume 1844, pages 169-172