Dr. Schoenbein on the Action of Hyponitric Acid. 227 



and make <R'OP=<ROP, and 

 <R'OQ'=<ROQ. In the direc- 

 tions O P', O Q' and O R', apply the 

 forces P', Q' and R' equal to P, Q 

 and R respectively ; these six forces 

 will, as before, be in equilibrium, and 

 R and R' being equal and opposite 

 may be removed; and hence P, P', Q 

 and Q' will balance each other. Now 

 since 



<POH = <P'OH = y-ft 



3* 

 2 



— «» 



and <QOG = <Q'OG 



the resultant of the equal forces 



Pand F = 2P.<p(~-^j, 



and that of Q and Q' = 2 Q . <p (^- - u) ; 

 hence, as there is equilibrium, we must have 



2P-*(t-0)=2Q.*(^-«) = 



p Q 



♦W-3 ♦&-*)' 



similarly, it is found that 



Q 



R 



4 



(¥-') 



Q 



R 



,(-_.) ,(«-_,) ,(-_ r y 



Since <$a = — cos a, this agrees with (] 7.). 



XXXVII. On the Action of Hyponitric Acid upon Aqueous 

 Solutions of Bromine and Chlorine. By Dr. C. F. Schosn- 

 bein*. 



HPHE hydrobromic and hydrochloric acids being decom- 

 A posed by nitric acid into water, hyponitric acid and 

 romine or chlorine, it appears little likely that by the com- 



1846. 



Communicated by the Chemical Society; having been read April 6, 



