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tapping boxelder trees
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<blockquote data-quote="guywhofishes" data-source="post: 210074" data-attributes="member: 337"><p>basically the denser the fluid (higher sugar content) the more strongly it pushes against and displaces something dropped in it </p><p>(the higher the bobber floats)</p><p></p><p>if you put one in water they sink to the zero mark</p><p></p><p>factory calibrated at 38F, a temperature that is consistent with sap gathering temps </p><p>(because fluid density is very temperature sensitive)</p><p></p><p>Kinda funny - it's just a coiled piece of printed paper slid into the stem - they must drop the unit in 38F water, adjust the zero mark by sliding the piece of paper, then lock it in somehow.</p><p></p><p><span style="color: silver"><span style="font-size: 9px">- - - Updated - - -</span></span></p><p></p><p>or remove some bottom weight? The darn things are heavy for their size.</p></blockquote><p></p>
[QUOTE="guywhofishes, post: 210074, member: 337"] basically the denser the fluid (higher sugar content) the more strongly it pushes against and displaces something dropped in it (the higher the bobber floats) if you put one in water they sink to the zero mark factory calibrated at 38F, a temperature that is consistent with sap gathering temps (because fluid density is very temperature sensitive) Kinda funny - it's just a coiled piece of printed paper slid into the stem - they must drop the unit in 38F water, adjust the zero mark by sliding the piece of paper, then lock it in somehow. [COLOR="silver"][SIZE=1]- - - Updated - - -[/SIZE][/COLOR] or remove some bottom weight? The darn things are heavy for their size. [/QUOTE]
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