Model of a Piston by Mr. Curie. 416. 



I agree in all point, with Mr. Perrot and consider the 

 construction most ingenious and simple. Theoretically, 

 the invention is perfect and should succeed and fulfil all the 

 desired results. Practically, I fear it may not. While the 

 cylinder is perfect, and the Piston plates fit the sides of the 

 same steam tight, the pressure on the sectional area, 

 within, will act as a perfect spring and perform what is 

 expected. But if the cylinder in the interior, is irregular 

 and badly turned or worn, or if the joints of the Piston 

 plates are not steam tight, then the pressure of the steam 

 will be general or universal in all parts, and consequently 

 inert. J. A. LLOYD. 



February 7, 1848. 



I perfectly coincide with the remarks of Colonel Lloyd„ 

 and also in the observations of D r Perrot. 



James MORRIS. 



February 8, 1848. 



Notice on the probable cause of the phenomenon 

 manifested in the Sugar-Canes ; presented by 

 Mr. W. Bo/'er at a meeting of the Council of 

 the Royal Society of Arts and Sciences, June 

 9 th , 1848. 



The phenomenon which has lately manifested itself in 

 the Sugar-Canes, particularly in the districts of the Sa>ane 

 and Grand Port, has produced so great an anxiety in th* 



