218 THE STRUCTURE AND LIFE OF BIRDS cuap. 
Phases of the Stroke.* 
Instantaneous photography has in many ways 
surprised the world. Horses no longer trot or gallop 
as they did. Birds get their wings into the most 
surprising positions, utterly unlike anything to be seen 
Fic. 57 (after Marey). 
Gull flying. 
in the conventional bird of the artist. Many Gulls 
have been photographed on the wing by Messrs. 
Wyles, at Southport ; some Storks, the favourite bird 
in the Fatherland, by Germans ; the American Eagle 
and other birds, by Mr. Muybridge ; and Professor 
Fic. 58 (after Marey). 
Gull flying—so images per second. 
Marey has obtained images of flying Gulls, at the rate 
of fifty per second, showing the various phases of the 
up- and down-strokes. The Southport Gulls are 
1 Some of this has been necessarily anticipated. See 
“Active Machinery,” and “Movements of the Wing partly 
due to the Action of the Air.” 
