ORDER II. AXOTOMOTTS LEAD-BARYTE. 145 



t 



P = { 72 IV } ' 124 50/> 137 '* IncUnation 

 of the axis = 29' in the plane of the long dia- 

 gonal. Vol. I. Fig. 41. HAIDINGER. 



a : b : c : d = 120 : 95 : 54-5 : 1. 



Simple forms. P oo (a); ?LnJ: (i) = 14723'; 



1 <g^ J94 

 - {930 



(Pr 1)3 (ki_(III32'i , (P 2) 4 

 -- l^J-llll 5'/ ; - 



(P + oo)^ (d) = 



Pr 2 (1) = 122 20' ; Pr 1 (m) = 84 

 3(K ; | Pr (ri) = 62 24'. 



Char, of Comb. Hemi-prismatic. Inclination of 

 P GO on ?r + x = 90 29'; of P oo 

 on P + oo = 90 14'. 



Combinations. 1. P oo. r "t 



2 2 



Sim. Fig. 113. 



2. P oo. ?r + 1 . ?._. ?!_1. 

 222 2 



P + oo. ?r + x. Sim. Fig. 112. 



VOL. II. K 



