DIMENSIONS OF KIDNEY 4S7 



The total number of renculi in the whole mass of the kidney will thus be given roughly by : 

 (80 or 85) x 5 Total weight of the kidney 

 2-4 Weight of the block ' 



ie (80 or 85) x 5 x 655 

 2-4 1-82' 



i.e. 5998 or 6372. 

 The true number will lie somewhere between these two figures. The block of 

 kidney substance was cut at random from the mass of a lobe of the organ, so that it 

 may be said that the calculation takes account of the space in the kidney occupied by 

 connective tissue and blood vessels. 



Estimations and counts by other authors all gave smaller numbers than this. 

 Beauregard and Boulart estimated the number to be 3000 and Daudt a little less. 

 Hyrtl's count of 156 only includes renculi at the three surfaces of a foetal Piked whale 

 (B. rostrata). Schulte found 1350 in a foetal Sei whale (B. borealis), Watson and Young 

 400 in Delphinapterns, Anthony 459 and 474 for Delphinus delphis and Mesoplodon 

 respectively. 



