HIBERNATION OF THE JUMPING MOUSE. 331 
became perfectly active, and was as ready to jump about as any 
other member of its species. 
I put this mouse into a little tin box with holes in the cover, 
and took him with me in my journeyings, taking care to put 
in the box a portion of an ear of corn and pieces of paper. 
ate the corn by gnawing from the outside of the kernel, and 
it gnawed the paper into bits with which it made a nest. On the 
fourth day after its capture I gave it water which it seemed to 
relish. On the 23d of January I took it with me to Elgin, Illinois, 
nearly three hundred miles farther north than the region where I 
found the specimen. The weather was intensely cold. Taking 
the mouse from the box, I placed it on a newspaper on a table, 
and covered it with a large glass bell, lifting the edge of the glass 
Soas to admit a supply of air. Under this glass was placed a 
good supply of waste cotton. Soon after it was fairly established 
in its new and more commodious quarters, it began to clean every 
part of its body in the most thorough manner, washing itself very 
much in the same manner as a cat washes. On coming to the 
tail it passed that long member, for its whole length, through the 
mouth from side to side, beginning near the body and ending at 
the tip. At night as soon as the lights were put out the mouse 
began gnawing the paper, and during the night it gnawed all the 
newspaper it could reach, and made the fragments and the cotton 
into # large nest perhaps five or six inches in diameter, and estab- 
lished itself in the centre. Here it spent the succeeding day. 
The next night it was supplied with more paper, and it gnawed all 
it could reach, and thus spent a large part of the night in work. 
i Could hear the work going on when I was awake. In the morn- 
mg it appeared to be reposing on the top of its nest; but after 
Watching it for some time, and seeing no motion, I lifted up the 
glass and took the mouse in my hand. It showed no signs of life. 
: now felt that perhaps my pet was indeed really dead; but on 
te what I had previously seen, I resolved to try to restore 
_ again to activity. By holding it in my hand and thus warming 
Sythe mouse soon began to show signs of life, and although it was 
ig the whole day in coming back to activity, at last it was as 
“Siete and afterward, on being set free in the aie it 
l eax. ut so swiftly by means of its long leaps, that it required 
On Us a long time to capture it uninjured. 
: the evening of February 6th I reached my home in Williams- 
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