To any one feeling inclined to undertake investigation on this gland, I would make a few suggestions:
(1) Make sections through gland hardened in bichromate of potash, or alcohol, and stain with staining fluids.
(2) Compare in material prepared as above described, the vascular supply of duct and gland substance proper.
(3) Compare gland and duct cells.
(4) Find the nuclei of the membrana propria and compare the same with the nuclei of the gland cells.
(5) See if you can examine the same nucleus from different sides. Do you think that the demilune of books and the nucleus of the membrana propria might be the same thing?
(6) Prepare pieces of the membrana propria covering the alveoli. What is your opinion—is there a membrane or only a reticulum of connective tissue cells?
(7) Prepare pieces of membrana propria of duct.
(8) Can you find the nuclei of the duct, and other nuclei on the exterior of the capillaries?
(9) Can you find pieces of capillaries belonging to the alveoli, and do you find any nuclei on them?