Plymouth/Barred Rock: Heat tolerant, very friendly and docile, tolerates confinement
Hamburg: Tolerates heat well, tolerates confinement, not especially docile
Easter Egger: Tolerates heat well, bears confinement well, especially docile
Leghorn: Tolerates heat well, bears confinement well, not especially docile
Campine: Tolerates heat well, tolerates confinement, not especially docile
Welsummer: Tolerates heat well, bears confinement well, not especially docile
Polish: Tolerates heat well, bears confinement well, especially docile
Silkie: Tolerates heat well, bears confinement well, especially docile, often broody
Sussex: Heat hardy, tolerates confinement well, very docile/friendly, curious
Australorp: Heat hardy, tolerates confinement well, docile
Belgian Bearded D'uccle: Heat hardy, bears confinement well, extremely docile
Wyandottes: Fairly heat hardy, tolerates confinement well, friendly, good mothers
Marans: Pretty heat tolerant, tolerates confinement, friendly, some of the darkest eggs
Of these breeds they serve the following purposes:
Decent/good layers: Plymouth/Barred rock (excellent), Easter Egger, (excellent) Leghorn (excellent), Welsummer (good), Silkie (good), Sussex (good), Australorp (excellent), Wyandottes (excellent), Marans (good), Campine (fair), Hamburg (Very good), Polish (good)
Ornamental: Polish, Silkie, Belgian Bearded D'Uccle