96 JOURNAL OF THE [Jul/r 



64. lodo-Sulphate of Quinine, with polarized light: by Geo. 

 M. Hopkins. 



65. Autograph of the Electric Spark : by Geo. M. Hopkins. 



66. Arranged Group of Diatoms, illuminated by Parabola : 

 by C. F. Cox. 



67. Crystals of Quinidine, with polarized light : by C. F. 

 Cox. 



68. Trichomes and Transverse Section of the Leaf of the 

 Long Moss, Tillandsia usneoides L., from Florida, with polarized 

 light : by J. L. Zabriskie. 



69. A new Microscope Lamp : by J. L. Zabriskie. 



70. Photomicro^raphic Apparatus with Photomicrographs (Al- 

 cove No. 7) : by E. G. Love. 



71. Palate of Whelk, Buccinum undatum .- by E, G. Love. 



72. Section of the Ovary of Indian Pipe, Monotropa uniflora .- 

 by E. G. Love. 



73. Section of Echinus Spine, Echinometra lucunter, with po- 

 larized light : by E. G. Love. 



74. Finest Manchester Muslin : by E. G. Love. 



75. Human Hair from Beard : by E. G. Love. 



76. Suction Cup from Arm of Devil-fish, Architeuthis prin- 

 ceps : by Wm. E. Damon : 



77. Skin of Sole: by W. H. Mead. 



78. The Ruby : by Geo. F. Kunz. 



Etchings of Steel, showing Structure (Alcove No. 8) : pre- 

 pared by P. H. Dudley and exhibited for him by Thos, 

 B. Briggs : 



79. Exterior columnar Structure of a .50 per cent carbon ^ 

 Bessemer Rail Ingot. 



80. A .26 per cent carbon Bessemer Rail Head, which is so 

 coarse thai it wears rapidly under heavy traffic. 



81. A good low-carbon Rail, the carbon being nearly all 

 combined. \ 



82. Dense Structure of a .60 per cent carbon Rail. 



83. A 3 per cent nickel Armor-plate Ingot. 



84. Ordnance .40 per cent carbon steel, after hydraulic 

 forging. 



85. Photomicrographs showing structure of steel. 



