CONTENTS. 
Comparison of Natural and Artificial Products 
Alkaline Carbonate formed on surface of Crustaceans aera 
with Shell 3 : 
Chemical conditions for the formation and coalescence of 
Carbonate of Lime in Crustaceaus : 2 
The part which vitality takes in the formation of Organic 
Structures 
Formation and coalescence of G@aangte on the eden of 
Crab 
Chemical conditions necessary ae the formation of Carbonate of 
Lime on the Apodemata 
Blastema, its signification, according to both views 
On the Shells of Molluses 
Part of the Shell of Oyster best for Sa ee, 
Lime composing the Carbonate comes directly from the rates 
The Nacreous Lustre not due to the plications of Membrane 
Chemical conditions for the formation of Carbonate in Oyster 
The formation of Interlaminar Cavities in Oyster 
The ultimate of the Carbonate of Lime in the Shells of MoHGses 
Amorphous state of Carbonate in Oyster-shell 
Conferve in Oyster-shell 
Arguments against the view of Cells being ferred first, ai the 
Carbonate deposited in them : 
Formation of Carbonate of Lime on Membranes have ene 
Rhombohedral masses resembling Crystals 
** Prismatic Cellular Substance” in shell of Pinna 
Structure and formation of Bone 
Use of Carbonate of Lime in Bone 
Formation of Lacune and Canaliculi 
The Nucleus in Lacune 
The use of Lacunie, Canaliculi, &e. 
The chemical conditions under which the ear thy macs is 
deposited 
Sclerous vegetable tissue ; 
Formation of less dense tissues by coalescence 
The physical explanation applies to the formation of tissues not 
to their function 
Cartilage compared with artificial srodicts 
Pigment-cells, development of 
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