Annual report of the Maine Agricultural Experiment Station . physi-ology of dwarf egg production makes to our knowledge of thenormal physiology of egg production. In the eight years from February 1, 1908, to February 1,1916, 298 dwarf eggs are known to have been produced at thisplant. The weight of 275 of these was taken and in 261 ofthese cases the length and breadth was also measured and thelength-breadth index calculated. Of the 298 eggs recorded274 were opened and their contents were examined. Several ofthe dwarf eggs were floor eggs and a few were laid by bird?on which no egg record was k
Annual report of the Maine Agricultural Experiment Station . physi-ology of dwarf egg production makes to our knowledge of thenormal physiology of egg production. In the eight years from February 1, 1908, to February 1,1916, 298 dwarf eggs are known to have been produced at thisplant. The weight of 275 of these was taken and in 261 ofthese cases the length and breadth was also measured and thelength-breadth index calculated. Of the 298 eggs recorded274 were opened and their contents were examined. Several ofthe dwarf eggs were floor eggs and a few were laid by bird?on which no egg record was kept. In 251 cases, however, theegg record of the bird laying the dwarf egg is available. Fur-ther several of these birds were autopsied and the condition oftheir sex organs observed. DWARF EGGS OF DOMESTIC FOWL. 29I I. Different Types of Dwarf Eggs Classified, First, inRespect to Shape and, Second, in Respect to Presenceor Absence of Yolk. The dwarf eggs of the fowl vary greatly in size and 51 shows fourteen of these eggs with a normal egg laid. Fig. 51. A collection of dwarf eggs with a normal egg in the centerof the group. X 2/3. 292 MAINE AGRICULTURAL EXPERIMENT STATION. I916. by a nine months old pullet for comparison. From this photo-graph it may be seen that there are two distinct types ofdwarf eggs in respect to their shape. The prolate-spheroidaltype similar in shape to a normal egg and the cylindrical typewhich is much longer in proportion to the breadth. Thecylindrical eggs are shown in the first column of Fig. 1. Thesecylindrical eggs occur much less frequently than do the dwarfeggs of the prolate spheroidal type. Not only do the dwarf eggs differ in respect to size andshape, but there is a difference in internal structure. Some ofthese eggs contain no yolk but appear to be formed around anucleus which consists of a few strings of coagulated albumen,apparently untwisted chalazal threads, and there are also some-times small lumps of hardened albumen or smal
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
