REGULAR FOUK-DIMENSIONAL HYPERSOLIDS. 17 



{A )lA , {B )i£ , {C )\C,{B )iD , 



^ CV2 1(5) (.2^ 1 'i 2 "1 ^ '2 1 



(^«)i^,..v (^.)i^,' ('^.'i^',' (^c'i*,' 

 (-^,..'„(-^r).„, (-B,.)„(^7). (t'„),(Cï3), (D^xpH), 



^',;„(--'^),n,. (^„)„(^^^).:,' <^',;,.(^'^),.,,. (-O,:),/^). 



(.re)^.(-^C),,,, (^c^c^C),,,, 



Diagram V. 





iB-C)^{BC), {BC-)^,{BC), 

 {B'B)^{BB), {BB)^XBB), 

 iC"B)^,{C'B), iCB)^XCB), 



{/(J) {A ) , (JB) {A ) , 



{A'B) {A ) , (JB) {A ) , 



{A'B) {A ) , {IC) {A ) , 



{B'C){B), {B"B){B), 



a A (I J 



{b'b)j,b^), {J^'ahb^), 



{B'A)^{B^), {jfC'liBj, 



{(fB) (C), iC% iC), 



II A (I A 



{C-B) [C), {C'A) {C ), 



II B a B 



{C'A) {C), {C'B) {C), 



au i( U 



{B^B)yj), (//c'Höj, 



{jyc)^^^^), {j)\i)^{B^), 



{B'A) {B ), {B'B) {BY 



{A'B)^^^^, {IC)^_^^, {A'B)^^,^,{B'C),{B'B),{G'B), 

 i^J^)^^, {AC'%o>, {AD\-,„ {BC'), {BB\ {CB\ 



