1 882.] 



Recent Literature. 



•403 



sents little matter subject to cr 



oppose some of the writer's 



regarding which there is naturally much difference of opinion. 



After describing the nature of volcanic action, well illustrated by 



the eruption of Vesuvius in 187.? (Fig. 1), which, with that of 



858, was probably more carefully observed and photographed 

 an any previous outburst, the work treats of the products of 

 n, the distribution of the materials ejected from vol- 

 r ith the various structures built up around them, as 



volcanic 



