. The Journal of laboratory and clinical medicine . the base of the feeder. The vestibule to the feeder is larger than necessary for a young ratweighing 40 to 50 grams, but it will accommodate a mature animal weighing250 to 300 grams. However, the feeder has given satisfaction with small ratsas well as with large ones, so that only one size has been used. In fact, the *From the Biocliemic Division, Bureau of Animal Industry, Inited States Department of Agri-culture, Washington. Received for publication, December 1, 1921. 688 THE JOURXAL OF LABORATORY AXD CLINICAL MEDICINE large rats have been
. The Journal of laboratory and clinical medicine . the base of the feeder. The vestibule to the feeder is larger than necessary for a young ratweighing 40 to 50 grams, but it will accommodate a mature animal weighing250 to 300 grams. However, the feeder has given satisfaction with small ratsas well as with large ones, so that only one size has been used. In fact, the *From the Biocliemic Division, Bureau of Animal Industry, Inited States Department of Agri-culture, Washington. Received for publication, December 1, 1921. 688 THE JOURXAL OF LABORATORY AXD CLINICAL MEDICINE large rats have been the worst offenders in pulling down feed into the baseof the feeder. For the most part, the rats do not pull out any considerable quantity offeed into the waste-feed receptacle, particularly if the ration is adequate, and Self-Feeder FOR RATS Made of Tin Plate and >femesh wire : Receptacle for catching waste : Wire-screen Vestibule to : Feed ; Cover for : Openinq qivinq access to feed.^ ^ ^ ^b-C: Plan View.
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