244 '/'liirli/si.rlli Aiiiiiifil Mreliin/ 



Tlicv would not l)c sliiil out of tlic lower walcr hy the t('m])era- 

 liiiv. 



Mr. Clark: Mr. I'n'si.lciil. s.iiii.. wars a-o. I liad jiisl thai, 

 .'■aiiic expt'iMcncc in inakiiii^- some imcst iii'at ions in a small lake 

 in Oakland County, M ichiii-an. in Walnut Lake, and that was in 

 N()\('inl)cr, and the .u'ill nrt was set not on slioi'c. hut in pri-liaps 

 five or six t\'ct o[' water, and lain out se\cral rods — 1 could not 

 give you the distaiu-e; we eauuht thii'ly whitelish, six lake trout 

 and one ])!ke ])ereli. Tlie whitetisli were in the net in not over 

 twenty feet. They wei-e hnnclied ri^lit in, and the lake trout 

 were ri,uiit just aliove tliem, and the one pike jiei'cli was above. 



President: \\'e liad this experience witli lake trout. 

 Wo wont to a lake in iiorthoiai Wisconsin, known as Trout Lake, 

 whicli I wrote of in tlio ])a]ior I ]nil)lishod in tlio last transao- 

 t'ons. althou,y]i the hike was examined aftor the inootin^-. \\v sot 

 our not thoro in tlio doo])ost water, vory close to a hundred foot, 

 and aft(M' it had heen sot. wo wont out and detonnined the oxygvu 

 right down to the hottoni of the water, and found oxygon there. 

 On hauling tlio net at the same time, wo f(nind a numlx'r oF 

 lake trout in the net at that depth, so they wi'iv in the very 

 bottom of the lake : as a matter of fact, they were in the l)ottom 

 part of the net, though 1 do not sivppose that had any special 

 significance; they might have moved down as well as up; hue 

 they wore in as deep and cold water as they could find. 



Mr. Clark : That was the reason they wore there, trying to 

 find that cold water. 



J'l-osidont: The not did not exti'ud from warm to cold water. 

 This was wholly into the deep water. 



^Ir. Carter: Is there any way to dotornune how much 

 oxygen there is? (*an you toll us? 



President: Wo have used the Winkler method of testing 

 for oxygen, if you know that. 



]\rr. Carter: 1 don't know anything about it at all. 



President: T am igiKu-ant of chi'mistry, yet 1 k'arnod in 

 half an hour to use the test, and think anybody else can. It is 

 one of the standard methods in the books. We use a pump and 



