Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 206
nt of time,—the middle and upper sets offeathers, which overlap the primary, secondary, and tertiaryones, constituting what are called the coverts and sub-coverts. The primary or rowing feathers are the longest andstrongest (b), the secondaries (a) next, and the tertiaries third(c). The tertiaries,… … g S3 s> J3 ,-S 8 a a o« o> 8 g~r£ fij»fs| Q 3S> 0 rffifcj ^ cfi p * ;M ^^ ^ j|| ? ~s>° •^ . tc o> ^^2 2 g §H a a c 2 u nfc * a .2 .£ £ g 53 f g !,,£, c; ^( rQ 2 § s c.S S iSps-s-tf Ti 5 ^ %a f 8 P * « si !M C £ «_, Soi. c u£ g s s^, * =| |.|j r^ Oj O ^j ^ i^ •riKf §2 p| ^% S t* *S B…
Animal locomotion · Aeronautics
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