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4 LEAFLET 2338, U. S. DEPARTMENT OF AGRICULTURE 
Fictrre 1.—Wing of chick showing Figure 2.— Wing of another chick with 
seven primary and seven secondary similar development of feather 
feather sheaths, all of which are sheaths. Both this figure and figure 
nearly equal in length. 1 show good types of fast feathering. 
FIGURE 3.—-Wing of chick showing good FIGURE 4.—Another example of 2ood 
wing-feather development but with wing-feather development. Both 
fewer and shorter secondaries than this figure and figure 3 show fairly 
those shown in figures 1 and 2. good types of fast feathering. 
FiGuRE 5.—Wing of chick of the slow- FigurE 6.—Wing of another chick of 
feathering type. Note fewer number the slow-feathering type. Note the 
of both primary and_ secondary short primaries with no secondaries 
sheaths. showing through the down. 
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