Heat Production of Newborn Lambs in Relation to Type of Birth Coat

The heat production has been measured of Merino lambs, with the coat artificially dried, less than 7 hr old, in still air at 68”F, and of the same lambs in a wind at the same temperature, with the coat artificially wetted. Indirect calorimetry was used. When the coat was wet the heat production ranged from 18-137 per cent. higher than when it was dry. The water which evaporated from the coat absorbed a substantial proportion of latent heat from the atmosphere. In general, wet lambs with a long coarse coat showed a much smaller increase in heat production above that when the coat was dry than did wet lambs with a short fine coat. concluded that lambs with a long coarse coat chance of surviving in cold windy weather. would have a It is better