MR. E. C. BABER, OK THE STRUCTURE OF THE THYROID GLAND. 
G07 
Fig. 14. From a transverse section of a thyroid gland of the Book, uninjected, 
hardened in alcohol and stained with hsematoxylin. Representing the 
epithelial walls of several vesicles containing yellow pigment-granules of 
various sizes. 
1, 1, i, x, i. Cavities of vesicles, whose contents are not represented. 
2 . Epithelial wall of a vesicle, seen from the surface, showing numerous pig¬ 
ment granules. (Obj. F, oc. I.) 
Fig. 15. Large round cells from a longitudinal section of the thyroid gland of the 
Pigeon, injected from the artery, hardened in alcohol and stained with 
picrocarminate of ammonia and with hsematoxylin. (Obj. 8, oc. I.) 
Fig. 16. From a section of the thyroid gland of the Tortoise, injected with -g- per 
cent, solution of nitrate of silver by the method of puncture, hardened in 
alcohol and stained with hsematoxylin. Surface view of the endothelium of 
a large lymphatic, showing in addition to the endothelial markings areas of 
various size, stained darkly with nitrate of silver. (Obj. 8, oc. I.) 
Fig. 17. From a longitudinal section of the thyroid gland of a Pigeon, injected by 
the method of puncture with •§- per cent, solution of nitrate of silver, hardened 
in alcohol and stained with hsematoxylin. 
1, i, i. Small intervesicular blood-vessels, into which the nitrate of silver has 
run, containing red blood-corpuscles. 
2 , 2 , 2 . Walls of ditto stained with nitrate of silver. 
3 , 3 , 3 . Gland-vesicles stained with hsematoxylin. 
In this specimen the blood-vessels also contain coagulated fibres which are not 
represented in the drawing. (Obj. 6, oc. I, tube drawn out.) 
Fig. 18. From a longitudinal section of the thyroid gland of the Pigeon, injected by 
the method of puncture with Berlin blue, hardened in alcohol and stained 
with hsematoxylin. 
1, i, i. Gland-vesicles only represented in outline. 
2 , 2 . Two arteries seen in transverse or slightly oblique section. 
3, 3. Vein containing red blood-corpuscles and partly surrounding the artei'ies 
In addition to the blood-corpuscles the vein contains Beilin blue injection, and 
some homogeneous balls which are not represented in the figure. (Obj. F, 
oc. I.) (For explanation of these two figures see above, p. 598.) 
Fig. 19. From a longitudinal section of the thyroid gland of a dog (male, aged 
3 months), uninjected, hardened in alcohol. Undeveloped portion seen in 
section lying in a depression on the surface of the gland. 
i, i, i. Layers of connective tissue separating the undeveloped portion ( 2 ) 
from the ordinary gland-tissue, and also forming septa running into the 
interior of the gland. The connective tissue is also seen to be continuous 
with the capsule of the gland. Blood-vessels are seen in it in section. 
