Preface.
The presenl roulrilnilion to Arctic l’ulmnnlnlngy i |he result of studies made priuripnlly during :1 slay at Yale (Penlwlyl Museum. New Haven, Conn, U. S A, Ilc>i<les having at hand llwru une of [he largest
scienlilic libraries in Anierim. l was also gleally :Iss‘ixlell Ivy lhe '1» slence in lhis museum of prerisely [he nullerinl that I needed. 2. his ls
from corresponding horisnns in lypirnl llll'illlllf‘h (Ill the Alnvl'ii'un (innli- nenl. ()l arm grenlor iinpm'lmice l0 HIP, huwevm', was [he lan lhnl I had opportunities of daily l||l9l’CUlIl’§l‘ \vilh lhe learned nnlsznnlolugisl
Prnlessur CHARLES minERT. ilnl'nlor nl |he lmlmnnlulugiral collerliuns al Yule Univerai ', one of [he greatest living {\lllllkil'llles on American Ordovician. Silurian, and Deranian lziunm nnd lheir Arctic development.
Furlherniore SCHUIIIIERT gave me an npporlunilv ol studying in the field under his guidance, the t‘ilslPI‘ll N. Ainerimn Silurian rind Devonian, in niosl beautiful sections in Maryland, Virginia and W‘ Virginia. on a delighllul S (lziys' excursion durng lht- spring ul 1913‘
It is not only a duty, but a great pleasure for me In lake [his
oppurlunity of expressing my hoarliesl llmn In Professor Sunrann'r
for all that he did for me during my stay in America.
Clirisliania November, 19l3, Olaf Holledahl.
