I9i i ] 



Laving Competitions. 



5^7 



emphasise more strongly that the test of these laying com- 

 petitions is to be applied by the mean, and not by what a few 

 heavy layers may yield. 



TABLE II. — Standard Deviations in South Australian Laying 

 Competitions, 1910-11. 



( The long transverse line shows the mean of all breeds combined ; 

 the short line in each column the mean of that breed ; the figures 

 in columns represent number of pens?) 



Laying Averages of Breeds Competing. 



No. of Egj 

 laid per hei 



Standard 

 Deviation: 



ire Flocks, 

 774- 



White 

 :ghorns, 

 522. 



pa m 



Black ' 

 inorcas, 

 6. 



Black 

 pingtons, 

 96. 



Buff 

 pin'gtons. 

 18. 



W 

 V 



«s . 



> ID O 



— c o> 



E 

 (C 



"S 0 



So ^ 



1 



No. of Eggs 

 laid per hen. 







Ent 







S 



6 



6 



> 





100-105 



-75 °4 



1 



— 



— 





— 



— 



I 



— 



100-105 



106-110 



- 70.04 



















106-110 



m-115 



-65-04 



— 

















i.Ti-115 



116-120 



- 60*04 



5 





— 









2 



1 



1 16-120 



121-125 



-55 '04 



4 



3 







— 







1 



121-125 



126-130 



-50-04 







— 









— 



1 





I3I-I35 



-45 "04 



4 



3 





- 



- 



- 







131-135 



136-140 



- 40*04 



5 



















136-140 



I4I-I45 



-35 '04 



2 



2 













_ 



141-145 



146-150 



- 30-04 



6 



3 











3 





146-150 



151-155 



-25-04 



9 



4 







2 



1 







I5I-T55 



156-160 



- 20*04 



2 



1 



- 





1 







- 



156-160 



161-165 



- 15-04 



10 



.5 







3 









161-165 



166-170 



- 10-04 



7 



3 













1 



166-170 



171-175 



- 5 '04 



4 



3 















171-175 



176-180 



Mean 



9 



6 







2 



z 







176-180 



181-185 



+ 5 '04 



7 



4 















i8i-i85 



186-190 



+ 10*04 



4 



3 















186-190 



191-195 



+ 15*04 



5 



3 







2 









191-19S 



196-200 



+ 20*04 



8 



7 







1 









196-20 0 



201-205 



+ 25-04 



4 



4 















20I-205 



206-210 



+ 30*04 



4 



2 







1 









206-2IO 



211-215 



+ 35"Q4 



3 



3 















2II-2I5 



216-220 



+ 40*04 



8 



8 















2l6-220 



221-225 



+45"°4 



7 



7 





— 











221-225 



226-230 



+ 50-04 



2 



2 















226-23C 



231-235 



+ 55"o4 



3 



3 















231-235 



236-240 



+60-04 





■3 















236-24O 



241-245 



+ 65 '04 



1 



1 















241-245 



246-250 



+70-04 



















246-25O 



252*16 



+ 75 '04 





1 















252*16 



Mean per hen. 



17804 



187-37 



I 7 I* 9 T 



181-0 



169-07 



i44"33 



168-01 



139-23 



Mean 



No. of pens below 



















Below 



mean 





64 



40 



I 





9 



1 



10 





No. of 



pens at 



















At mean 



mean 





2 







1 







1 





No. of pens above 





















mean 





63 



47 



I 





7 



2 



4 





Above 



Table II. contains the records for entire flocks and separate 

 breeds. In this the standard deviations are worked out. 

 These are much wider than in the English table, consequent 

 upon the longer period of laying and the greater variations. 

 For example, a pen of Silver Wyandottes laid only 604 eggs, 

 or an average of ioo*66, and, therefore, had an average of 



