55 
of Edinburgh, Session X875-7t>. 
five, in the second for three, and in the third for four hours. The 
layer of pumice and ashes measured some 4J inches deep in the 
Jokulsdal, and 1J in the Seyfiisfjorb. This was the sixth explosion 
since the outbreak, and about every tenth or twelfth day the violence 
increased. The line extended through the Od&fiahraun to a little 
north of Reykjahlifi-Grimstafiir- road. 
About Easter-day a thick smoke was seen at Mofirudal a Fjollum ; 
it rose south of Herfiubreifi, and many erroneously thought that it 
came from Mofirufialsland. Others supposed it to rise from the 
Dyngjufjoll, but it was certainly from Yatnajdkull, or from the 
Tungu (Boab or Mesopotamia), formed by the westermost forks of 
the Jokulsa. The discharge of pumice ( Danice u Pimpsteen ”) was 
so abundant that for days the ferry boats could not cross the stream. 
The “ Norbanfari ” of May 13 contains an unsigned article, 
bringing up the account of our My-vatn eruption to May 5. Loud 
thunderings with thick smoke were noticed on the last “ Tuesday 
in the winter,” that is, on April 13; the summer beginning with 
“ Sumarm&l,” April 17. On the “ first summer day ” (April 22) 
four men took horse to visit the volcano. From Kollottafjall they 
saw a fiery crevasse, made like a mountain u fjargyd,” or sheep 
fissure where the animals take refuge during bad weather; and 
on the borders of the SveinagjA, where a fine grassy plain formerly 
extended, they found a high hill of lava pierced with three craters 
lying on a meridian. These vents roared loudly, and threw up 
rocks, which returned to the earth after 45 seconds. The smaller 
rapilli rising like smoke disappeared in the air, and presently fell 
like snow. From the largest focus, which lay south of the road, 
a fiery flood ran westward : it had been reported three (Danish) 
miles long, but it proved to be about 1000 fathoms, with a breadth 
of 300 to 400. The people of My-vatnssveit have lost a little 
grass, chiefly to the north of the road, and their ponies may suffer 
during the winter. Some convulsion has taken place in the 
Dyngjufjoll, whence, for a long time, more smoke issued than 
during the winter. There was a great eruption close to the Od4<5a- 
liraun on March 18 and 19, and the concussion of the air drove 
the farm peeple from their beds. On March 23 fire was reported 
to have proceeded from forty places lying close to the Holsfjoll 
road, but it lay west, not east, of the Jokulsa. 
