t 



\ 



/^ 



llp^^ 



se in 



sue 



co-^T 



) 



^sccnce 



) k. 



s® 



(p® 



(Rainey.) 



of coalescence, [i 



by 



by 



mode 



ito contact, ffJ 

 ■cular rearracr 



when 



nc?ia 



ame co 



decoD^F 



ndition^ 



ev 



ous 



^ to do .-Ul^ ^^, 

 th strontia 



77/^ BEGINNINGS OF LIFE. 



63 



into a single larger calculus. The change is a most 

 remarkable one, during which there is brought about 

 ' the perfect coalescence into one, of two or more glo- 

 bules of carbonate of lime as much as xis" of an inch 

 in diameter, perfectly transparent, of a hardness nearly 

 equal to that of glass . . . the incorporation of these 

 globules being so complete, that the resulting one has 

 the same spherical form, the same degree of trans- 



tf 



a a a 



F 



Fig. 41. 



Globular Carbonate of Lime in later stages— formation of Calculi by 



' Molecular Coalescence/ (Rainey.) 



Mulberry-like bodies due to the aggregation of several small 

 globules. These gradually undergo change from circumfer- 

 ence to centre. The external globules first coalesce into an 

 amorphous granular layer, which gradually becomes more 

 transparent, and similar changes extend inwards. 

 b b' 6" b'" Further stages of aggregation and molecular coalescence. 



