SEVENTH ANNUAL RECEPTION. 505 



53. Metallic Chromium, free from carbon; over 99 per 



cent. Cr. 



54. Ferro-Titanium, 20 per cent. Ti. 



55.- Ferro-Titanium, 10 per cent, free from carbon. 

 55.1 Metallic Tellurium. 



56. Antimony from Japan. 



57. Metallic Zinc and its ores. 



58. Ores of Aluminum, cryolite. 



59. Ores of Aluminum, Bauxite. 



60. Anhydrous Alumina. 



61. Ingot of Aluminum. 



61. 1 Aluminum foil, y5^o"o" °^ ^^^ "^^^ thick. 



62. Carborundum Crystals from Electric Furnace. 



7. Refractory Materials. 



63. Clay Brick. 



64. Silica Brick for Extreme Temperatures. 



65. Magnesia Brick to Resist Basic Slags. 



66. Chromic Neutral Brick, Resisting both Acid and Basic 



Slags. 



8. Models of Metallurgical Apparatus. 



6y. Bessemer Converter. 



68. Siemen's Regenerative Gas Furnace. 



69. Iron Blast Furnace. 



70. Hot-blast Stove for heating blast for iron blast furnace. 



9. Pyrometry. 



71. Le Chatelier thermo-electric pyrometer. 

 10. Lecture Diagrams. 



72. Triaxial diagram of the isotekes of the lime-alumina 



silicates. 



73. Duquesne Blast Furnaces of the Carnegie Steel Com- 



pany. 



74. Duquesne Blast Furnaces of the Carnegie Steel Com- 



pany. 



75. Flame of the Bessemer Process. 

 ,76. Flame of the Bessemer Process. 



Annals N. Y. Acad. Sci., May 4, 1900. — 32. 



