500 EXPLANATION OF THE PLATES. 



PLATE CXIII. 



PORTRAIT OF THE LATE MR. WATT, THE CELEBRATED INVENTOR AND 

 IMPROVER OF THE STEAM ENGINE. 



PLATE CXIV. 



PORTRAIT OF THE LATE MR. TREDGOLD. 



PLATES CXV., CXVII., AND CXVIII*. 



These drawings are designed to illustrate the state of steam navigation in America, 

 in reference to Professor Renwick's paper on that subject, inserted in the Appendix, 

 page 101. 



* Plate CXVI unfortunately not having reached us, we have reluctantly been compelled to 

 abandon it. 



