1 82 On the Composition of Oceanic 



TABLE IV. Oceanic Nodules. (Summary of Results.) 



In calculating the "Formula of Peroxide" the MnO equiva- 

 lents of the Co 2 O 3 and Ni 2 O are taken in the lower ones, and 

 only the MnO found is taken in calculating those in brackets. 



TABLE V. Littoral Nodules. (Summary of Results.) 



* The upper numbers, in brackets, refer to the original substance, the 

 lower ones to the insoluble residue. 



