244 Memoir upon living and fossil Elephants, 



covered with cement, we should have a battery composed 

 of 1-inch plates equal to one composed of 6-inch plates, 

 according to the construction of Cruikshanko. The plates 

 iu this arrangement can easily be repaired, and the acid 

 fluid may be left in the trough. 



I am, sir. 

 No. 19, Yours respectfully, 



-Soho Square. C. WiLKINSON. 



N. B. It will necessarily be understood that the bent wire 

 is to be placed on each partition, and the same order observed 

 as in other galvanic arrangements ; that a zinc plate soldered 

 to one bent wire shall be in the same cell with a copper plate 

 soldered to another bent wire, a'ld taking care that these 

 plates are not in contact with each other. This species of 

 galvanic arrangement may be seen at Mr. Eastwick's, 102, 

 Aldersijate-street. 



XXXVII. 'Additional Memoir upon living and fossil 

 Elephatits. By M. Cuvier. 



[Continued from p. G5^ 



i. HAVE drawn up a table of the numbers and dimensions 

 of these laminae, v^hich I subjoin. From this wc may see, 



1st, That the laminae vary in thickness in various indivi- 

 duals of each species, 



2uly, That there is, as wc have said a little before, a con- 

 nection between this thickness and the number of the lami- 

 nie ; i.e. the more lamince there are in a tooth, the thicker 

 is each lamina taken separately. 



3dly, That nevertheless, by comparing together some teeth 

 with the same n'.iniber of lamins, these lamina; always oc- 

 cupy a space sensibly less in fossil grinders, and that this 

 difference goes very far in certain specimens ; and so much 

 the further, the greater the number of laminEE. 



TABLE. 



