REGISTER OF PLATES, MAPS AND OTHER ILLUSTRATIONS. 
331 
Page. 
Crystal of Columbite, by C. U. Shepard, = - 220 
R. Hare’s Apparatus for obtaining Specific Gravity of the 
Gases, 295 
ss Ke cf Nitrous Oxide, - 296 
Sea Pink, [an Amphitrite, ] - - : 329 
Lachrymatories, from Island of Milo, &c., - - 333 
Apparatus for blasting Rocks, - - - 373 
Vor. XVII.—PuateEs. 
1. Junction of Trap and Sandstone, at Eocky Hill, near Hart- 
ford, Conn., (Frontispiece,) - 123 
2, View and Topographical Plan of Mines of Paseo, - 43 
3. Figures of Images found in Peru, - 117 
4. Map of the Magnetic [sodynamic Curves in N. Hemicehere! 145 
5. Siamese Twin-Boys, - - - - 212 
6. Portrait of Sir Machine Davy, - - - Q17, 
Woop Cuts. 
Apparatus for using Mineral Fusible Cement,  - - 84 
Figures illustrating Attraction of Liquids, - 98 
Crystal of Ferro-Silicate of Manganese, by o U. Shepard, 142 
se Yenite, by C. U. Phenerd, 143 
Diagram of a model city, 260 
Apparatus for Welther’s Tube “s ir by E. “Mitchel, 345 
Portable Hygrometer, by A. A. Hayes, - 352 
Figure of Columbite, by C. U. pokepard, - - 358 
Figures of Zircon, - - - 360 
Kiln for making Charcoal, - - - - 396 
Vou. XVIII.—Puates. 
1. Figures of the American Locust, (Cicada septendecim,) AT 
2. View near the Upper Falls on the Genesee River, - 209 
3. Map of the Wyoming and Lackawanna Valleys, by George 
Jones, with a Profile of the Railroad from Carbondale to 
Lackawaxen River, - - - - 308 
4,5. Theory of Springs and Benning: - 273 
6, 7, 8. Fossil Organic Remains of the Ferruginous Sand Form- 
ation of the U.S., - - - - - 249,250 
Woop Cuts. 
Diagram of Curve of Perpetual Congelation, - - 9 
Wilder’s Geometrical SMS - - - 38, 41 
Marine Ventilator, - -— - 77 
Crystals of lodine, by W. iW: Mather, - . 85 
Fossil Stems, &c., in Mines, - - - > 112,113 
