334 REGISTER OF PLATES, MAPS AND OTHER ILLUSTRATIONS. 
Page. 
Apparatus for measuring Expansion and Contraction of Stone, 137 
$s “© showing ‘Eifect of Elasticity, - - 191 
Brewster’s Diagrams “illustrating Polarization of Light by 
Reflection, - - - - - 278, 284 
De Witt’s Conical Rain Games. - : - 321 
Thomson’s Diagram relative to Railroads, ' - 347 
Electro-magnetic Apparatus, - : - 410, 412,415 
Vou. XXIII.—Puates. 
1. Geological Map of the Mining Districts in Georgia, and parts 
of North Carolina and Tennessee, by J. Peck, - 1 
2,3. Organic Remains of the Ferruginous Sand Formation of 
the United States, - - - - 288 
Woop Corts. 
Brewster’s Diagrams on certain points in Optics 29, 30, 31, 226, 227 
Figures of Hail Stones, - - - 36 
Diagram to illustrate Field Surveying, : - 39 
Ancient American Utensil, - - - - 66 
Wollaston’s Reflecting Goniometer, simplified by Graves, 76 
Wood’s Inking Machiae: - - - - 103 
Instrument for Venous Injection, - : - 114 
Plan of Mantell’s Museum of Natural History, - - 164 
Trilobite found in Staffordshire, England, - - 203 
Locke’s Microscopic Compass, - : - 237, 238 
Apparatus for analyzing Atmospheric Air, - - 287 
Figure of the Delphinus globiceps, (Cuv.) - - 302 
Economical Furnace for warming houses; - - 326 
Stove Drum ss : ms - 330 
Dumont’s Syrup Filter, —- - - - 301 
Glass Syphons for transferring Corrosive Fluids, - 387 
1. 
2. 
Vou. XXIV.—P ares. 
Maps illustrating Canal Surveys in the State of New York, 19 
Plan of the Canal Locks at Cincinnati, Ohio, - - 72 
8,4. Organic Remains of the Ferruginous Sand Formation of 
the United States, - - - - - 128 
Elementary Illustrations of Architecture, - - 257 
5. 
Woop Cuts. 
Sections, views, &c., illustrating Phillips’s Essay on the Geor- 
gia Gold Mines, 3, 4, 5, 6, '7, 8, 9, 10, 12, 18, 14, 15, 17, 18 
Thomson’s geometrical Diagrams, - - 77 
Emmet’s Magneto-electric ‘Apparatus, i: - 79 
