118 JOURNAL OF THE [October, 



50. Circulation of Protoplasm in Vallisneria spiralis : by F. 

 W. Devoe. 



51. File-tongue {Odontophore) of the New Jersey Conch, 

 Sycotypus canaliculatus, with the shell : by Samuel Lockwood. 



52. File-tongue {Odontophore) of California Trochus, Calli- 

 osfotna canaliculatum, with the shell : by Samuel Lockwood. 



53. File-tongue {Odontophore) of Patella, or Limpet Shell, 

 Acmcea ieshidinalisy New England coast, with the shell : by Sam- 

 uel Lockwood. 



54. Photomicrographic Apparatus : by F. D. Skeel. 

 55-59. Star-fish and Sea-urchins, illustrated by living forms, 



microscopic specimens, and drawings: by G. W. Kosmak. 



60-66. Etchings of Steel Rails, showing Structure : by P. 

 H. Dudley. 



60. A .60^ carbon Rail, with broad, shallow head. 



Dense structure. 



61. A .45^ carbon Rail, with deep head. Porous 



structure. 



62. A good wearing Rail, made in 1863. 

 6t,. a rapid wearing Rail, made in 1880. 



64. Nickel Armor Plate. 



65. Specimens of Tests of Armor Plate, Ordnance, 



and Rail Steel. 



66. Photographs of Drop Tests of a .60^ Carbon 



Rail, etc. 

 67, 68. Sections of Silicified Wood, Araucaria Briggsii, from 

 Arizona : by T. B. Briggs. 



67. Transverse Section. 



68. Radial Section. 



69. Section of Wood, Araucaria excelsa, from Norfolk Isl- 

 and : by T. B. Briggs. 



70. Platino-cyanide of Yttrium, shown by polarized light: 

 by E. G. Love. 



71. Seeds of Orthocarpus purpurascens : by E. G. Love. 



72. Pollen of Mallow, Malva rotundifolia : by E. G. Love. 



73. Foot of Spider: by E. G. Love. 



74. Photomicrographs : by E. G. Love. 



75. Pond Life : by W. C. Kerr. 



76. A^Living Diatom, Bacillaria paradoxa: by T. Craig. 



