i$6 THE NATURAL HISTORY 
Count Button tried a fimilar experiment with frogs and 
fifh, in the month of February ; thofe which he put into wa¬ 
ter, which was open to the air, and were allowed to rife to 
the furface, continued to live; but thofe that were put into 
a veffel of water, under circumflances exadlly fimilar, except 
that they were rettrained from coming up quite to the furface, 
foon (hewed fymptoms of uneafinefs, and died ; fome in fix 
hours, and thofe that furvived the Iongeft, in two days. 
Mr. Frifch tied to the legs of Swallows, threads dipped in 
water colours; the next year, he atterts, that he faw the 
fame birds, and that the threads had not lott their colour. 
Additional Observation. 
Mr. White, the ingenious author of the Natural Hiflory of 
Selborne, whofe remarks well deferve the attention of every 
ornithologifi, from repeated obfervations, inclines to the opi¬ 
nion, that many of the Swallow kind do not depart from this 
ifland, but retire to holes and caverns, from which they are 
allured even in the winter, when the Weather is warm and 
inviting. 
The CHIMNEY SWALLOW. 
The forehead and chin, a reddifn chefnut colour; the plu¬ 
mage above blackifh, glotted with purple; beneath white; the 
tail forked ; all the feathers in the tail, except the two in the 
middle, marked with an oval white fpot, near the end. 
The Chimney Swallows feem by inftin£t at¬ 
tached to the habitations of men. They build 
their nefts in our chimnies, and even in cham¬ 
bers, 
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