. Quarterly journal of experimental physiology and cognate medical sciences. Fig. 4.—Section fioni a normal rat-pancreas like that shown in fig. 1, butstained by Mallorys method (acid fuclisin, orange G, and aniline blue)instead of hsematoxylin. Microphotograph ; magnified 100 zymogen masses, which are stained deep red by the acid fuchsin,come out black in the photograph. Au islet of Langerhans is includedin the field : zymogen is most abundant in the circumjacent 5.—Section of the same pancreas, also stained by Mallorys methodbut magnified 500 diameters. The zymogen gr
. Quarterly journal of experimental physiology and cognate medical sciences. Fig. 4.—Section fioni a normal rat-pancreas like that shown in fig. 1, butstained by Mallorys method (acid fuclisin, orange G, and aniline blue)instead of hsematoxylin. Microphotograph ; magnified 100 zymogen masses, which are stained deep red by the acid fuchsin,come out black in the photograph. Au islet of Langerhans is includedin the field : zymogen is most abundant in the circumjacent 5.—Section of the same pancreas, also stained by Mallorys methodbut magnified 500 diameters. The zymogen granules come out black in the photogra})h. Some ofthe nuclei of the cells are faintly shown. Studies on the p]n(loorine (Hands 263 There is no appreciable ditterence in the (|uantity of the granulesas a result of twenty-ff>ur hours fastiiifj. A few small ahfolar cells are stained h()iiK)^f»neously yellow bythe orant;e (J of the Mallear} stain ; indeed, the imclei are coloured is rarely or never evidence of karyokinesis in any cell of thenormal pancreas. I have never been able to cletect a mitosis, evenin the pancreas of animals which are still tjrowintj. Occasionallyvacuoles occur in some of the cells of the alveoli, but they are large and conspicuous as the cliaracteristic vacuoles which maketheir appearance as the result of feeding with thyroid (see p. 267).
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