1. The two subdivisions of the basophiles of the fowl pituitary-“cyanophilic beta cell” and “fuchsinophilic beta cell”-are morphologically and cytologically distinct.The most important features in the differentiation of the two types are the functional affinity to the portal blood vessels. Their significance is at present obscure.2. Cyanophilic beta cell contains two kinds of droplets, one is a blue in color, and the other is an orange to red.3. PAS positive granules are found in the beta cell of fowl pituitary, therefore the granules are glycoprotein in nature.4. The GOMORI positive droplets are identical with the orange to red droplets stained by the CLEVELAND and WOLFE's method.5. There is no correlation between the PAS positive granules and the GOMORI stained granules or droplets in the fowl pituitary, but in the cow pituitary the GOMORI positive granules are responsible for the margenta color staining of the basophiles by the periodic acid SCHIFF reagent in the Mc MANUS technique.
In order to elucidate the relationship between the lateral hypothalamus, involving the occipito-mesencephalic and quinto-frontal tracts, and body temperature, electric destruction was carried out in various areas of the lateral hypothalamus in 35 chickens. Lesions extending from the anterior commissure to about 480μm rostral to it brought about transient hyperthemia to birds. On the other hand, destructions of all the lateral hypothalamus reaching from about 1.000μm caudal to the anterior commissure to the infundibulum and of the occipito-mesencephalic tract alone induced poikilothermia immediately after operation, which manifested severer symptoms than the former birds. In addition to these facts, the responses of the operated birds to a quick rise and fall of environmental temperature suggest that the area causing poikilothermia may work as a thermal regulator, and that the territory causing transient hyperthermia may be concerned with heat loss only.
'%3e%3cg id='b'%3e%3cpath id='a' stroke='%23000' stroke-width='2' d='M-6-25H6m-12 3H6m-12 3H6'/%3e%3cuse xlink:href='%23a' y='44'/%3e%3c/g%3e%3cpath stroke='%23fff' d='M0 17v10'/%3e%3ccircle r='12' fill='%23cd2e3a'/%3e%3cpath fill='%230047a0' d='M0-12A6 6 0 0 0 0 0a6 6 0 0 1 0 12 12 12 0 0 1 0-24z'/%3e%3c/g%3e%3cg transform='rotate(-123.69)'%3e%3cuse xlink:href='%23b'/%3e%3cpath stroke='%23fff' d='M0-23.5v3M0 17v3.5m0 3v3'/%3e%3c/g%3e%3c/svg%3e)
