PREFACE. 



1 he present paper is a result of work done in the Mineralogical 

 hnstitute of the University of Christiania in 1920. Professor V. M. Gold- 

 schmidt, Director of the histitute, kindly allowed me the free use of all its 

 resources, and let his assistant, Mr. L. Thomassen, execute for me a number 

 of chemical analyses and help me in m\' own analytical work. Professor 

 J. Schetelig, Director of the Mineralogical and Geological Museum of the 

 Universit}' of Christiania, with great courtesy placed the collections of 

 Norwegian eclogites and related rocks at my disposal, and let his pre- 

 parator, Mr. A. Granli, make thin sections of the rocks. Dr. H. H. Reusch, 

 Director of the Geological Survey of Norway, let me use his unpublished 

 notes on certain parts of the eclogite-bearing regions in Western Norway. 

 Professor Dr. C. F. Kolderup, Director of Bergens Museum, gave me spe- 

 cimens of eclogites from the Bergen region for study. Finally the Direc- 

 tors of the Mineralogical Institute and the Museums of Christiania and 

 Bergen promoted my work in the most \aluable way by giving me an 

 opportunity to make excursions in some of the most interesting eclogite- 

 bearing regions in the districts of Nordtjord and Sendmore in Western 

 Norway, at the expense of these institutions. 



For all their amiable helpfulness shown to me I wish to express to 

 these gentlemen my most sincere thanks. I also have to thank numerous 

 other Norwegian geologists and other persons who all showed to me, an 

 alien in their country, the kindest friendliness. 



I am also very much obliged to Dr. H. S. Washington and Mr. O. An- 

 dersen for their kindness in making grammatical corrections in my writing. 



During this work I have had assistance from the Universit}^ of Helsing- 

 fors (Rosenberg's Travelling Bursaries Fund) and from Alfred Kordelin's 

 General Trust for the Advancement of Progress and Knowledge, in Finland. 



Christiania, February 1921. 



Pen Hi Es ko la. 



