. Bulletin. Agriculture -- New Hampshire. 28 N. H. Agricultural Experiment Station [Bulletin 303 3. Intestinal disturbances in chicks as a cause of mortality. 4. Lung congestion (pneumonia) as a cause of mortality. 5. Chicks have been brooded at a wide range of temperature. Inasmuch as the standards of temperature and brooder ventilation were established by the writers, this fact can not be held as a failure of the equipment. On the other hand, the evenness of maintaining a given temperature throughout the area under the canopy is a function of the brooder itself and is affected by brooder des
. Bulletin. Agriculture -- New Hampshire. 28 N. H. Agricultural Experiment Station [Bulletin 303 3. Intestinal disturbances in chicks as a cause of mortality. 4. Lung congestion (pneumonia) as a cause of mortality. 5. Chicks have been brooded at a wide range of temperature. Inasmuch as the standards of temperature and brooder ventilation were established by the writers, this fact can not be held as a failure of the equipment. On the other hand, the evenness of maintaining a given temperature throughout the area under the canopy is a function of the brooder itself and is affected by brooder design. Power Ventilation One of the more recent developments in electric brooder design has been the addition of power ventilation in the form of a fixed speed mo- tor-driven fan, running continuously. This has not changed the method to an "automatic system" but simply boosts the fixed values to higher ratios of air supplies per hour per watt of heating element. This, in turn, reduces the effective heat in the brooder compartment. From the standpoint of temperature alone this raises the question whether the same result cannot be obtained by reducing the amount of electrical heat generated and omitting the forced draft effect. The condition of the air under the brooder as regards moisture and general quality would appear to require a definite number value of ajr changes per hour not now known. ^ Restlessness-^AcXWiiy or movement of chicks during the night period has been a constant factor throughout the four years of tests. Wliile this chick movement may be attributed to the restlessness of young individuals, there appears to be more than is normal. This is probably a result of improper temperature and air conditions. (See charts of chick movement.). Chicks crowding beyond curtain, (taken by photo-flash lamp at night), a condition frequently observed throughout the Please note that these images are extracted from scanned page images that may have been digit
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