ee | Srrone, An Observation Tent. 293 
they help greatly in holding the tent in shape during a strong 
wind. In a stiff breeze, there is considerable bellying of the cloth 
on the windward side, but with so much space inside this is not 
serious. 
The tent is six and one half feet high which accommodates most 
men in the erect position even with a hat. It is five and one half 
feet wide and seven feet long, at the ground. The four upright 
poles are six feet, eight inches long. The two end bottom poles 
are six feet long and the side bottom poles eight feet. The end 
roof poles are two feet six inches long, and the side roof poles are 
four feet long. 
The usual method of entering the tent with a companion who 
may emerge at once and go away with any boat or vehicle used in 
transportation is always followed. I have never known this 
procedure to fail to deceive birds. They show vastly less concern 
than when there is no companion to leave the tent and the vicinity. 
It is possible to see a good deal through the tent cloth without 
being visible from outside, and one may look through the openings 
rather freely without being noticed by birds. For a more complete 
discussion of the behavior of birds about a tent, and for various 
details in its use, the reader is referred to my paper on the behavior 
of the Herring Gull. 
Professor Reighard of the University of Michigan spent two days 
with me in this tent during July, 1913, and he appears standing 
beside it in Fig. 2. This picture was made at Muskeget Island 
off the Massachusetts coast. We were comfortable and had 
abundant space for work. He has made some improvements in 
the line of portability which he has kindly described for me to 
publish with this account. The corner pieces are of aluminum 
and are made extra strong. The longer poles are provided with 
brass socket and ferrule joints so that no pole piece is over four 
feet long. He writes that “the whole outfit is compact and can 
be carried in a canvas bag with a handle like a valise.” 
