128 Mr GREEN, ON THE PROPAGATION OF LIGHT 



fffdx dy dx$(j) m 



-ffdyd^ASu + A^u + ^Jv + ^w) 



\ ax ay a%J \d% ax) \dy ax I J 



-ffdxdz{Bh + B{^Su + ( ^v + ^w) 



I -.du „dv n dw\ „ T jdv dw\ , ^rfdu dv \ » 1 

 V M ay as / Vass ay ) \ay ax) ) 



-ffdxdy{ciw + C^u + fjv + ^Zw) 



I r^du n dv r dw\ , T /a"?; «?W\ , -y r (du dw\ t 1 



+ ( Q ^ + P ^ + / ^^ + i U + a>)^ + iV te + ^)H 



+ ///rf*%rf»l«|G + ^ + (N + B) d ^+ {M + C)g 



/\r r>\ ^** /o r\ d'W ] 



