The American journal of anatomy . the litter averages being taken (see above). The broken line atthe right shows the trend of the post-natal relations, as indicated by the obser-vations on the adults. The information thus gained is only general, as thereare no indications concerning the age of the specimens, or the rapidity ^^-ithwhich the changes take place. mm., and the average weight g. (litter 13, which con-tained eight specimens, only three of which were dissected).These embryos would probably not be more than 23 days old,according to Keibels figures, although some allowance mus
The American journal of anatomy . the litter averages being taken (see above). The broken line atthe right shows the trend of the post-natal relations, as indicated by the obser-vations on the adults. The information thus gained is only general, as thereare no indications concerning the age of the specimens, or the rapidity ^^-ithwhich the changes take place. mm., and the average weight g. (litter 13, which con-tained eight specimens, only three of which were dissected).These embryos would probably not be more than 23 days old,according to Keibels figures, although some allowance must bemade for variation. The duration of pregnancy in the pig is given by Coburn (94)as 112 days, by Long (06) as usually 112, varying from 110 to 120 LAWSON G. LOWKEY 116 thiys according to the age of the mother, and by Spencer(98) as 16 weeks. This would place the usual time as 16weeks or 112 days. Long (06) gives some figures for the weight of litters from oneyear old sows. The litters average pigs to the litter, the total. 39 58 84 107 130 Body Length in Millimeters Fig. 5 Curves showing the relative growth of the pancreas, thyroid and supra-renal glands. These curves were secured by arranging the average percent-age (for the litter) which the organs foi-m of the net body weight, accordingto the average body length (in millimeters). In certain cases, several littersare combined, the average of the litter averages being taken (see above). Thebroken line at the right shows the trend of the post-natal relations, as indicatedby the observations on the adults. The information thus gained is only gen-eral, as there are no indications concerning the age of the specimens, or therapidity with which the changes take place. average weight being about lbs, or about 6,442 gms. Thisis an average weight of about 826 g. per pig. For sows two tothree years old, the pigs average about 1,190 g. each. For thoseabout five years old, the pigs are still larger, weighing about o
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
