ledaboutanddoubledonitstracksand,forwrecks,itisstrewnwiththecasesofcadiswormsmadeofminutegrainsofwhitequartz.Perhapsthesehavecreasedit,foryoufindsomeoftheircasesinthefurrows,thoughtheyaredeepandbroadforthemtomake.Buttheiceitselfistheobjectofmostinterest,thoughyoumustimprovetheearliestopportunitytostudyit.Ifyouexamineitcloselythemorningafteritfreezes,youfindthatthegreaterpartofthebubbles,whichatfirstappearedtobewithinit,areagainstitsundersurface,andthatmorearecontinuallyrisingfromthebottomwhiletheiceisasyetcomparativelysolidanddark,thatis,youseethewaterthroughit.Thesebubblesarefromaneightiethtoaneighthofaninchindiameter,veryclearandbeautiful,andyouseeyourfacereflectedinthemthroughtheice.Theremaybethirtyorfortyofthemtoasquareinch.Therearealsoalreadywithintheicenarrowoblongperpendicularbubblesabouthalfaninchlong,sharpconeswiththeapexupwardoroftener,iftheiceisquitefresh,minutesphericalbubblesonedirectlyaboveanother,likeastringofbeads.Butthesewithintheicearenotsonumerousnorobviousasthosebeneath.Isometimesusedtocastonstonestotrythestrengthoftheice,andthosewhichbrokethroughcarriedinairwiththem,whichformedverylargeandconspicuouswhitebubblesbeneath.OnedaywhenIcametothesameplaceforty-eighthoursafterward,Ifoundthatthoselargebubbleswerestillperfect,thoughaninchmoreoficehadformed,asIcouldseedistinctlybytheseamintheedgeofacake.Butasthelasttwodayshadbeenverywarm,likeanIndiansummer,theicewasnotnowtransparent,showingthedarkgreencolorofthewater,andthebottom,butopaqueandwhitishorgray,andthoughtwiceasthickwashardlystrongerthanbefore,fortheairbubbleshadgreatlyexpandedunderthisheatandruntogether,andlosttheirregularitytheywerenolongeronedirectlyoveranother,butoftenlikesilverycoinspouredfromabag,oneoverlappinganother,orinthinflakes,asifoccupyingslightcleavages.Thebeautyoftheicewasgone,anditwastoolatetostudythebottom.Beingcurioustoknowwhatpositionmygreatbubblesoccupiedwithregardtothenewice,Ibrokeoutacakecontainingamiddlingsizedone,andturneditbottomupward.Thenewicehadformedaroundandunderthebubble,sothatitwasincludedbetweenthetwoices.Itwaswhollyinthelowerice,butcloseagainsttheupper,andwasflattish,orperhapsslightlylenticular,witharoundededge,aquarterofaninchdeepbyfourinchesindiameterandIwassurprisedtofindthatdirectlyunderthebubbletheicewasmeltedwithgreatregularityintheformofasaucerreversed,totheheightoffiveeighthsofaninchinthemiddle,leavingathinpartitiontherebetweenthewaterandthebubble,hardlyaneighthofaninchthickandinmanyplacesthesmallbubblesinthispartitionhadburstoutdownward,andprobablytherewasnoiceatallunderth