Bui. 



1 15, Bureau of Chemistry. U. 5. Dept. of Agriculture. 



Plate VI. 



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Fig. 1. — Longitudinal Section. 



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V * 



v-V-V 



-\ ,\* A. 



X* 



^ 



Xi 



F'G. 2.— TRANSVER6E SECTION. 



Normal Chicken Muscle. 



[Zeiss: 4mm. objective, apochromatic ; No. 6 ocular, compensating.] 



