6 THK ICK A(;K in CANADA. 



of th(»so rt'som'chcs were ])iiI)Iisli(Ml from liiut' li» time in 

 the '■ ('aiiiidian Xiitunilisl and Ocold^ist." When, in l.SO:!, 

 Sir William issued jiis "(}('(»l<(n;y ot' Canada," I was iiiuch 

 <)i"L'n|)i('d with cuIIcmc work, and t'eJL lliaL the, snlijccl was 

 too innMatuic to admit of full tfeatnicnt, \n\i i)la('(id in his 

 hands my notes up to that date, to aid in his chaplcr on 

 " Superlicial (icolony," in which they were incoi'itoraieil, 

 thon,uli ill an impcrfrct, luainiri'. Suhsc'(|uenlly, in 1S7-, 

 1 ('oll(!t'tud all luy jtapiTs up to that dale in u littlo 

 vohimc entitled " Noti's on the I'ost-iiliocene (looloyy of 

 Canada," now ouu of jnint, though most of its material is 

 tti he found in the earlier volumes of the "Canadian 

 Naturalist and (Jeolo.nist." This work 1 have made tin; 

 hasis of suhs('(pient ])uhlieations, addiu;^ new material as 

 it occurred, and puhlishini;' the whole; in the same 

 periodical and its continuation, the " Canadian Record of 

 Science." The present woik is a new anil enlarged edition 

 of these "Notes" of iSTl'. 



Since my work in this held he^an, the suhject has 

 assumed many new ]thases. 'i'lie impoitanl studies of the 

 Swiss julaciers, l»y Forhes, A<:;assi/ and others, attracted 

 the attention of i;'eolo,n'isls almost to the exclusion of 

 other factors. The hold, I may ventiu'e to say extreme, 

 views of my friends, iiamsay and (ieikie, have gi\en a 

 tone to the work of Enu'iish ^'eologists, while a like 

 intluence has been exercised in America by Agassi/ and 

 Dana. Tims, in later years, what I must regard as 

 extravagant theories of laml glaciation have gained an 

 educational ami otlicial currency both in England and 

 America. Only recently the ])endulum has begnn to 

 swing in the other direction, and the extreme theories of 

 glacier action to relax their hold. The time is, therefore, 

 perhaps a favonrable one to advocate moderate and 



