Annalen der Physik und Chemie. 91 



has also extended his researches to the latter class, and finds that 

 the ossified cartilage does not contain a materially less quantity of 

 lime than the bones of the higher vertebrata. The spine of Squa- 

 lus cornubicus, after being exposed to a white heat, till all the 

 animal matter was consumed, left in one instance 41.55, in another 

 42.068 per cent, of ashes. The following is the result of his ana- 

 lysis. 



Combustible animal matter, 57.07 Sulphate of soda, 0.80 



Phosphate of lime, ... 32.46 Muriate of do, 3.00 



Sulphate of lime, 1.87 Phosphate of magnesia, ... 1.03 



Carbonate of lime, 2.57 Siliceous earth, argillaceous do. 



Fluate of lime, a trace. iron, and loss, 1.20 



100.00 

 The Tubercular cartilage of a large ray gave 



Combustible animal matter, ... 78.46 per cent. 



Carbonate of lime, 2.67 



Phosphate of do, 14.80 



Sulphate of do, 0.83 



Fluate of do, a trace. 



Muriate of soda, 2.46 



Sulphate of do, 0.70 



Phosphoric acid, magnesia, and loss, 14 



100.00 



No. 1 1 , Vol. xxxix. contains a brief statement of the results of seve- 

 ral experiments upon the electric rays, by M. Matteucci, who thinks 

 that the Natural History of these animals is far from being under- 

 stood, and is therefore still occupied in its investigation. M. Fran- 

 cis Schulze of Berlin has also communicated a preliminary state- 

 ment of his experiments upon equivocal generation, and upon the 

 metamorphoses of Amylum. 



