THE GROWTH OF THE BODY AND ORGANS OF THE 

 ALBINO RAT AS AFFECTED BY FEEDING VARIOUS 

 DUCTLESS GLANDS (THYROID, THYMUS, HYPOPH- 

 YSIS, AND PINEAL). 



E. R. HOSKINS 



Institute of Anatomy, Universittj of Minnesota 



FOUR CHARTS 



CONTENTS 



I . Introduction 296 



II . Literature 297 



III . Material and methods 3q1 



IV. Original observations, 



1. Body as a whole. Weight and length 305 



a. Comparison of controls with norms 305 



b. Effects of thyroid, thymus, hypophysis and pineal feeding.. 310 

 2- Head 316 



3. Eviscerated body 31g 



4. Integument 317 



5. Skeleton 317 



6. Brain 319 



7. Eyeballs 320 



8. Thyroid 322 



9. Th5TOus 322 



10. Heart 327 



11. Lungs 328 



12. Liver 328 



13. Spleen 329 



14. Alimentary canal 33I 



15. Suprarenal glands 33I 



16. Kidneys 332 



17. Ovaries 333 



18. Testes 334 



19. Epididymi 335 



20. Pineal body 335 



21. Hypophysis 336 



22. Summary 337 



a. Controls and norms 337 



b. Effects of thyroid feeding 338 



295 



THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL. 21, NO. 3 

 OCTOBER, 1916 



