140 



THE UNIVERSITY SCIENCE BULLETIN. 



TABLE No. 5— Concluded. 



Class. 



450-474 

 475-499 



500-524 



525-544 

 550-574 

 575-599 



600-624 

 625-649 



650-674 



Pig. 



K2 



Avg. 



M4 

 P6 



Avg. 



M8 

 M2 

 Ml 

 Avg. 



G2 



Avg. 



M7 

 Avg. 



06 

 P3 



Avg. 



P9 



Avg. 



G7 

 Gl 

 G5 



Avg. 



G4 

 G3 

 P4 

 D5 



Avg. 



Pig 

 weight 

 in gms. 



460 



475 

 495 



500 

 515 

 515 



549 

 550 



581 

 590 



620 



635 

 635 

 640 



658 

 665 

 665 

 669 



Percent 

 weight. 



.177 

 .177 



.250 

 .311 

 .281 



.251 

 .179 

 .237 

 .222 



.233 

 .233 



.239 

 .239 



.409 

 .273 

 .341 



.311 

 .311 



.347 

 .510 

 .312 

 .390 



.443 

 .286 

 .292 

 .417 

 .360 



Pig 

 length, 

 in cms. 



Per cent 

 length. 



Class. 



675-699 



700-724 



725-749 



750-774 



800-824 



825-849 



925-949 



974-999 



1025-1049 



1075-1099 



Pig. 



P5 

 .R2 



Avg. 



P2 



.-^vg. 



PI 

 P8 



Avg. 



Dl 

 D2 



Avg. 



D3 



Avg. 



D4 



Avg. 



R5 

 R3 



Avg. 



R4 



Avg. 



R6 

 Avg. 



Rl 



Avg. 



Pig 

 weight 

 in gms. 



675 

 693 



700 



735 

 740 



752 

 771 



815 



843 



925 

 932 



999 

 1,035 

 1,098 



Per cent 

 weight. 



.293 

 .224 

 .259 



.305 

 .305 



.311 

 .271 

 .291 



.397 

 .334 

 .366 



.351 

 .351 



.421 

 .421 



.270 

 .361 

 .316 



.301 

 .301 



.287 

 .287 



.226 

 .226 



Pig 

 length 



Per cent 

 length. 



Comparisons Made to Correlate the Size of Underdeveloped 

 AND Overdeveloped Pigs with the Size of the Thymus, Tak- 

 ing Percentage Thymus by Weight as a Standard, and Grad- 

 ing Pigs in the Litters by Length. 



As the title above indicates, table No. 6 is the result of an at- 

 tempt made to correlate the size of underdeveloped and overde- 

 veloped pigs with the size of the thymus, taking percentage thymus 

 by weight as a standard, and grading pigs in the litters by length. 

 In each litter the two smallest foeti (by length) and the two largest 

 were studied as to percentage thymus by weight as seen in column 

 F in the table. The percentages of the two smallest and the two 

 largest were individually averaged (column G), and the two aver- 

 ages compared; the correlation noted was recorded in column H. 

 Positive or + correlation is taken to mean that the overdeveloped 

 pigs in the litter had a greater percentage of thymus than the under- 

 developed pigs. As seen from the table, there were nine positives 

 and nine negatives, hence we must conclude, from the data at hand 

 now, th^t no parallelism exists between the large and small size, re- 

 spectively, of underdeveloped and overdeveloped foeti, and the per- 

 centage of thymus by weight. 



