. The poultry manual. A complete guide for the breeder and exhibitor . During the years 1904 and1905, Hearsons Incubatorswere tested at the UniversityCollege, Reading, with otherhot - water and hot ■ airmachines, the result beingthat each year HEARSONS INCUBATORS hatched the highest per-centage of eggs recorded. HEARSONS Cramming Machine. HYDROTHERMIC FOSTER MOTHER

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Keywords: ., bookcentury1900, bookdecade1910, bookidpoultr, booksubjectpoultry