J. Croli— Arctic Interglacial Periods. 311 
great measure due to the fact that most of those, if not all, who 
have visited those regions entertained the belief that there is an 
prior: improbability that a condition of climate which would 
recently as Post-tertiary times, Even supposing those Arctic 
voyagers had considered the finding of interglacial deposits a 
likely thing, and had in addition made special search for them, 
the simple fact that they should have failed to find any trace 
of them could not, as we have already shown, be regarded as 
even presumptive evidence that none existed. Take Scotland 
48 an example. Abundant relics of intergiacial age have there 
been found from time to time; but among the many geolo- 
move every remnant of the preceding interglacial land- 
surface, except here and there in deep sheltered hollows, or in 
Spot, j 
q"arries, in railwa -cuttings, and other deep. excavations that 
traces of them accidentally turn up. Now if it is so difficult 
have been so much greater. : : 
Something like indications of an interglacial period appear 
'o have been found by Professor Nordenskjild in Spitzbergen. 
dn the interior of Ice-fjord,” he says, ‘“‘and at several other 
Places on the coast of Spitzbergen, one meets with teint 
ow 
gen, having been probably rout 
°onstantly driven by the ocean-currents along the coas | 
his testimony is the more valuable as it is given by an 
€Xperienced geologist so much opposed to the theory of inter- 
*"On former Climate of Polar regions,” Geol. Mag., Nov. 1875, p. 531. See 
also “Geology of Spitzbergen,” Geol. Mag., 1876, p. 267. 
