Experimerits on the Strength of Woods, by Mr. Barlow, Jun. 179 



qsinp = [0-56697] sin (E'+166° 59' 24-") - 0-28859 

 qcosp = [0-65768] sin (E' + 298° 18' 42") +1-39075, 



and the agreement of the orbit with these observations may 



be seen from the following ephemeris : 



The following Table exhibits its comparison with Struve's 

 observations : 



The total discrepancy between the orbit and the observa- 

 tions of the years 1818-1823, proves that if this system obeys 

 the law which we have assumed, the great diminution of the 

 distance of 1825, in comparison with that of 1830, cannot 

 have taken place. 



[To be continued.] 



XXIII. Experiments on the Strength of different Kinds of 

 Woods : made in the Carriage Department, ^Royul Arsenaly 

 Woolwich. By Mr. Peter Barlow, Jim. As. Inst. Civ. Eng.* 



T^HE following series of experiments, several of which I 



'*• attended, being made on species of woods, the strength 



of which has not been previously ascertained, will I trust not 



Communicated by the Author. 

 2 A 2 



be 



