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Quartz±sillimanite segregations, quartz±albite lithologies (Ab 95±98), and Kiruna-type low-Ti iron-oxide deposits are associated with late-to post-tectonic (c. 1055 Ma) leucogranites of Lyon Mountain Gneiss (LMG) in the Adirondack Mountains, New York State. Most recent interpretations of these controversial features, which are global in occurrence, favour(More)
The enteric nerve plexuses of the domestic fowl (Gallus domesticus) were investigated in sections and stretch preparations by means of the cholinesterase and glyoxylic acid fluorescence histochemical techniques. Cholinesterase-positive and varicose and non-varicose fluorescent nerve fibers were distributed at all levels of the gut in myenteric, submucosal,(More)
The presence of granular endocrine cells was investigated in the lungs of 4-6 weeks old Ringed Turtle Doves (Streptopelia risoria) by scanning and transmission electron microscopy. No granular cells were observed with the scanning electron microscope. In alternate semithin and ultrathin sections granular cells were found either singly or in small groups in(More)
The arrangement of the muscle at the ileo-caeco-rectal junction of the domestic duck (Anas platyrhynchos) was studied using light microscopy, three-dimensional reconstruction models and scanning and transmission electron microscopy. The junction consists of a papilla-like protrusion of the ileum into the rectum, the 'ileal papilla', lateral to which are the(More)
The size of the neurons in the myenteric plexus of the duodenum, jejunum, ileum, rectum and cecum of chick and adult domestic fowl (Gallus gallus) was estimated using a histochemical technique for NADH diaphorase activity. The mean size of the neurons varied between different regions of hte gut and increased with age. In both chicks and adults the largest(More)
The development of the epithelium and its innervation was investigated with the electron microscope in the larynx and trachea of embryo domestic fowls between the 10th and 21st days of incubation. From days 10 to 16 the airways were lined by undifferentiated cells which on day 15 or 16 became arranged in two distinct layers. Differentiation of the(More)
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