On the Embryo of the Seeds formed in the Rpot alone. 1 S3 



those on the Clyde have their machinery all constructed on one 

 general plan ; namely, that of paddle-wheels similar to under- 

 shot water-mill wheels on each side of the vessel, which are put 

 in motion by the steam-engine. 



Reference to Drawings of Steam- Boat. 

 Plate III. An elevation ; a side view showing one of the pad- 

 dle wheels. 

 IV. A plan, showing the extent of eabin floor. 



A. The fore or second cabin. 



BB. Space for the machinery. 



C. The iron chimney, serving also as a mast. 



D. The boiler. 



EE. The steam-engine. 



G. The crank. 



H. The fly-wheel. 



II. The paddle-- wheels. 



K. Ladies' cabin. 



L. Steward's room. 



M. Principal cabin. 



NN. Stairs down to the cabins. 



00. Water closet. 



PP &c. Gangway. 



QQQ. Seats at stern and on the deck. 



R. The rudder. "^ 



S. Covering of paddle-wheels. 



XXXIII. J Paper proving that the Emhryos of the Seeds are 

 formed in the Root alone. By Mrs. AgisEs Ibbetson. 



To Mr. Tilloch. 



_^ Siiervvoofl, Feb. 24, 1815. 



Sm, — i. HAT time is now arrived, of which I last year promised 

 to give notice, when the seeds are to be discovered mountiiTg 

 in the all)urnum vessels froiH the root. It is a ph;enomenoii ?.o 

 easily seen, that I cannot helj) calling on botanists in general 

 to convince themselves of a fact of such consequence to science, 

 and establishing the foundation (if admitted) of a more perfect 

 knowledge in the formation of plants than we yet j)ossess. It re- 

 r.uires no other preparation (to vieu' it well) than merely cutting^ 

 off a small piece of the outward rind of any tree, then cuttiiig an 

 extremely thin shce adjoining the several cuticles, which if it is 

 the proper piece (that is the alburnum vessels) it will be so soft 

 as to cut with the utmost ca'^e. In this specimen, with the naked 

 eye, if held up to the light, but certainly with a small magniher, 

 rlie seeds will be seen mounting the tree, i shall first give a 



M 4 complete 



