and the Mudlumps of the Mississippi. 



ults. as max be supposed, a very pecnliaj'sir 

 1, unlike anything usually seen ontsidr oi' 

 li'S.-, i)crliaps in the somewhat annldLioii.- <■.! 



;■ less coarse 

 lie selvedges 



■ales. Where 



:■'■ confluent at their bases, the structure is of course 

 t* (1 in a manner readilj- imagined. 



.■ 'Ills the gas evolved (vvhich is in all cases inflammable), 



' l)r()])ortion its bulk bears to that of the mud simul- 



y ejected (about ^^ to g'o at Marindin's Lump), at once 



ly with the impression mostly entertained, 1ihat the gas 



^ bring up the mud with them. The latter comes up 



^trady flow, evidently the result of static pressure, and 



li-omtime to time agitated by a gas bubble, larger or 



■''ii^-ller according as the mud is more or less consistent We 



sometimes find, about extinct cones especially, lively gas 



springs in which the proportion of gas is considerably greater, 



tban happens in any active cone that has come under my 



observation ; but in that case, it is almost always accompanied 



""r^'M water, as though its source were above the stratum 



which furnishes the mud. For, a glance at the river deposits 



V^^iJig around the lumps, at once shows that they are totally 



aiflerent from the fine, clayey material of which the cones are 



rormed ; nor is it credible that the mere passage of a current 



01 water and gas through such deposits, or in fact, any camolidated 



^tenals, should produce such a perfect, creamy mixture as 



tiiat ejected from these crater^ 



minct C(me5.— Good exai 



rOutre. While at the latter place it 



reach the craters without being hopelessly 



s Thomassy'i 



