LOBULES OP PIG S LIVER 



279 



maceraton allowed to proceed until the lobules separated. The 

 lobules were then counted under a hand-lens, a few- being taken 

 out at a time with a pipette and removed to a watch glass. In 

 counting, the individual parts of compound lobules were con-' 

 sidered as separate lobules; so also were the cut portions of the 

 lobules which came from the cut surfaces of the block. This 

 number was reduced by one-half the number of surface lobules 

 counted, since I assumed that in slicing a piece of liver, the sum 

 of the cut lobules on one side equals the sum of those on the 

 other. Dividing the number of lobules obtained in this way 

 into the weight of the block gives the weight per lobule, and the 

 weight per lobule into the weight of the liver gives the total 

 number of lobules. The average of a number of counts on nine 

 different livers are given in the table below. The average weight 

 per lobule obtained is 2.41 milligrams and the average number 

 of lobules 702,000. The latter number is somewhat higher than 

 that (480,000) obtained by Mall as the average number of lobules 

 in the dog's liver. 



TABLE 1 



' The "average weight per lobule" was obtained fro.ii calculations based on 

 counts from several blocks taken from each liver. 



