tracts by tters commonly causes a

    pond to break up earlier; for ter, agitated by the wind, even

    in cold  suc

    t on alden t year, for s a thick new

    garment to take this pond never breaks up so

    soon as t bots

    greater depts ream passing t to melt or

    to open in the course of a

    er, not excepting t of 52-3, whe ponds so severe

    a trial.  It commonly opens about t of April, a en

    days later ts Pond and Fair o melt on

    ts o freeze.

    It indicates better ter s te progress

    of t affected by transient changes of

    temperature.  A severe cold of a feion in March may very

    mucard temperature

    of alden increases almost uninterruptedly.  A ter t

    into tood at 32x,

    or freezing point; near t 33x; in ts

    Pond, t 32+x; at a dozen rods from the shore, in

    ser, under ice a foot t 36x.  this difference of

    temperature of ter

    and tter pond, and t t a great

    proportion of it is comparatively s should break

    up so muc part was

    at time several inche middle.  In

    mider t and t

    t the

    pond in summer must er is

    close to than a

    little distance out, and on t is deep, than near

    ttom.  In spring t only exerts an influence through

    temperature of t its  passes

    t or more ted from ttom

    in ser, and so also er and melts the under

    side of t time t it is melting it more

    directly abov