. The diseases of poultry. Poultry. 146 dis1':as1'S of The tgg advances into tl:e more glandular and vas- cular ])art of the oviduct and here two other layers of albumen are secreted and deposited ujion it. Each of these is thinner and more watery than the one which preceded. When the narrow part of the oviduct is reached, two denser layers of albumen are excreted forming the inoubrana pittaminis. Enclosed in tliis manner, having acquired its ovate form and with the. Fig-. 37. Seel km of fowl's eprp; ", shell;/', iiieiiibia';i piitain'mis; <,i, layers of soft albiinu'ii; i/,
. The diseases of poultry. Poultry. 146 dis1':as1'S of The tgg advances into tl:e more glandular and vas- cular ])art of the oviduct and here two other layers of albumen are secreted and deposited ujion it. Each of these is thinner and more watery than the one which preceded. When the narrow part of the oviduct is reached, two denser layers of albumen are excreted forming the inoubrana pittaminis. Enclosed in tliis manner, having acquired its ovate form and with the. Fig-. 37. Seel km of fowl's eprp; ", shell;/', iiieiiibia';i piitain'mis; <,i, layers of soft albiinu'ii; i/, clialaza'; <â , cicau-iciila ami H-ermiiial vesicle; /, air clianiber. The outline litrure shows Uie vo 1\ made up of la\ ers de- posited successively, c, cicatricula, /', yerniiiial vesicle. small end towards the cloaca, the o.^^ enters the uter- ine or shell-forming dilatation. The inner surface of this portion of the oviduct secretes and deposits upon the incmbrana putaminis a thick white fluid which condenses, becomes calcareous and forms the shell. The time required for the ^<g% to pass from the infundibulum to the uterus, in the common fowl, is said to be from four to six hours, and it may remain here from twelve to twenty hours. The color of the egg-shell depends ii])()n i)igmental matter secreted by particular follicles of the villous. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Salmon, D. E. Washington, D. C. , G. E. Howard & co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpoultry, bookyear1899
