364 
FOREST AND STREAM 
June, 1918 
REVOLVERS AUTOMATIC PISTOLS ' 
AUTOMATIC MACHINE GUNS 
For nearly three-quarters of a century COLT’S FIRE¬ 
ARMS have played a dominant part in the brilliant 
military achievements of our country. 
COLT'S are the REVOLVERS and AUTOMATIC 
PISTOLS that have been officially adopted by the 
United States Government. 
For individual home protection you can safely place 
your trust in the firearms on which Uncle Sam has put 
his unqualified O. K. 
prvi T*?Q " The Proven Best 
1 ■* JL by Government Test * * . 
\\ Illustrated catalog 29 mailed free on request /j 
Colt’s Patent Firearms Mfg. Co. 
/ \x Hartford, Conn. \ 
r?v u. s. A. 
ROBERT H. ROCKWELL 
2504 Clarendon Road, Brooklyn, N.Y. 
U.S.Army and Navy Goods 
Also complete outfitters for 
ARMY AND NAVY OFFICERS 
Wool Coats Canvas Leggings Shirts 
Wool Breeches Hats Gloves Shoes 
Array Sweaters Blankets Canteens 
Navy Sweaters Overcoats Mess Kits 
Leather Leggings Sleeping Socks Boots 
and 5000 other useful articles for field service— 
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Price list 5 sent on receipt 3c postage. j 
ARMY & NAVY STORE CO., INC. 
Largest Outfitters—Mo Inflated Prices. 
Army and Navy Building 
245 West 42nd St. (Bet. B’y & 8th Av.) New York City 
A Strike 
means a catch, when you keep 
your reel, your rod, your line and 
your flies in perfect condition with 
3-in-One Oil 
A famous fisherman says,**Every Angler 
should carry 3-in-Onein his kit." 3-in-One 
makes reels run right, prevents rust on 
steel rods, prevents cracking of cane oi bam¬ 
boo rods and makes silk or 
linen lines stronger. Also 
keeps “dry flies" dry . 
FREE —Booklet and sam¬ 
ple of 3-in-One. 
3-in-One Oil Co, 
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SINGLE TRIGGER For Parker 
A Highly perfected Trigger of the latest approved type. 
Made of the finest Material and Workmanship. Its few 
parts do Not cut away the sto~k Alter or Mar the Gun. 
Trigger is fully Guaranteed. Price $15.00. send for de¬ 
scription matter. 
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SOMETHING ABOUT 
BATS 
B ATS are found in tropical and temper¬ 
ate climes all over the world, and are 
a very large and important group; yet 
about hardly any order of animals living in 
the open air is so little known. The bats 
of North America are exclusively insect¬ 
eating, and their destruction of insects has 
often been referred to, but, though much 
detailed work has been done and many 
papers published to demonstrate the useful¬ 
ness of insectivorous birds, little has been 
said of the economic value of bats. The 
work of these is no doubt most important 
in keeping in check insects which fly in the 
dusk and in the darkness. They eat many 
species harmful to agriculture and many 
that carry disease, such as the hosts of 
malaria-bearing mosquitos. 
Much matter interesting to the layman is 
to be found in a paper recently published 
by the University of California entitled “A 
Synopsis of the Bats of California,” by 
Hilda Wood Grinnell. It deals with more 
than sixty species of California bats, and, 
quite apart from the systematic and techni¬ 
cal material given in connection with each 
species, there are frequent notes and sug¬ 
gestions throwing interesting light on the 
habits of these mammals. 
Much has been written about certain pe¬ 
culiar senses of bats, and it is generally 
understood that a bat confined in a room 
will never dash itself against the wall or 
any object in the room or against a window 
pane. Bats turned loose in a many-win¬ 
dowed room, though evidently seeking a 
means of escape, were never seen to dash 
against a window pane, as a bird would 
do under like circumstances. The theory 
advanced to explain the bat’s recognition of 
the invisible barrier, glass, is that the bat is 
warned by increased pressure of the atmos¬ 
phere as the animal approaches the window 
pane. 
The hearing of the bat seems good, and 
Dr. J. Grinnell has suggested that bats hunt 
their insect food by sound. He says: “Even 
the wing strokes of a tiny miller must be 
distinct and audible to the bat, which snaps 
it up so unerringly, and the droning of a 
June beetle must sound to the bat as pene¬ 
trating as the roar of a biplane motor does 
to us.” 
It has been pointed out that, except where 
their habits have been modified by the 
changes wrought by man, North American 
bats may be classed either as cave-dwelling 
or as tree-dwelling. Many species of bats 
are known to gather in considerable num¬ 
bers in sheds, unoccupied rooms of dwell¬ 
ings and simiiar places, while others live in 
trees. Those occupying caves or portions 
of old buildings usually live in large colo¬ 
nies, while those that dwell in trees live 
singly or in small companies. It is known 
that some bats migrate, although little in¬ 
formation has been obtained on that sub¬ 
ject. Mrs. Grinnell tells, however, of three 
California bats that are known to be mi¬ 
gratory in portions of their range, and facts 
pointing in this direction are given for 
other localities. 
Most bats catch their prey on the wing 
and devour it without alighting. The hard 
parts, such as wing cases of beetles, are 
bitten off and dropped to the ground, while 
the soft edible parts are eaten. Bats be¬ 
come very fat in the autumn and this fat 
