PLATE XIX. 



Fig. 11 



Fig. 111. 



?ig. 115. 



Spherical crystals of carbonate 

 me. examined by trans- 

 mitted hht. in air. 



O 



O 



o 



The same in water, p 6P. 



The same in Canada balsam 

 p. 70 



Fig. 116. 



The same viewed by reflected 

 light, p. 70 



Fig. 117. 



The same under the influence 

 of polarized Ii6ht. p. 70. 



Fig. IIS. 



Octahedral crystals as seen by 

 reflected light, p. 70. 



Fig. 119. 



Ai- 



: :edra in air, by transmitted 

 lighi. p. 69. 



Fig. 120. 



Octahedra in water, p. 6P. 



Fig. 121. 



Octabedra in Canada balsam 

 :: 70. 



Fig. 122. 



O 



Air bubbles, in water, p. 70 



Fig. 123. 



. 



O ' OO o 



O' 9 ?=o . 

 O . 

 rt 



Free oil globules and collections. 

 p. 70. 



Fig. 124. 



'p. D ^0.3/^0.? J 



' 8 O ' O 



Oil globules. Milk. p. 70. 



Fig. 125. 



p3 ?.' 



o *-;::-x' 



lobules in collections, and 'cells' 

 containing oil globules, p 70. 



Fig. 126. 

 <k b j> 



) Q 



o a 



., , 



Oil globules from milk. o. masses formed by two 

 or more globules running together p. 70. 



[To face page 72. 



