86 



veloped so large as to crowd out the rest 

 of the body. 



The various acids, chemicals, and 

 bacterial poisons used seem to act upon 

 the multiplied egg, after it has sub- 

 divided many 

 times into a com-, 

 pound egg. These 

 are fragments bro- 

 ken off by the poi- 

 sons in the blood 

 of the mother, and 

 the particular di- 

 visions which are 

 poisoned cause the 

 malformations and 

 freaks. 



Making Hens Lay 

 Double Eggs 



Examples of eggs 

 Avithin eggs have 

 been attributed to 

 the serpentine 

 movements of the 

 flexible canal 

 through which they 

 pass. Hens fre- 

 quently lay several 

 double eggs in suc- 

 cession. Fere, a 

 distinguished i n - 

 vestigator, claims 

 that he succeeded 

 in producing double eggs in a hen which 

 normally laid single eggs, simply by 

 drugging her with belladonna. Glaser, 

 another biologist of 

 note, has de- 

 scribed the ovary 

 of a hen which 

 habitually laid dou- 

 ble eggs and con- 

 cludes that fusion 

 is the explanation 

 of some double 



The one which 

 Professor Chiches- 

 ter wishes to re- 

 cord is a "gourd- 

 shaped" egg. Pro- 

 fessor Hargitt 

 studied one, which 

 was not preserved 

 carefully, and on 

 account of evap- 



A twin dog-fish, the result of some chemical 

 effect upon the egg 



A twin fish 



starting to 



develop 



A double head in process of formation 

 TADPOLE MONSTERS 



Popular Science Monildy 



oration, the condition was such that he 

 could not be certain of the presence of 

 yolk in the smaller end. He assumed 

 that the egg was comprised of about 

 normal parts in the larger end, and that 

 t h e smaller con- 

 sisted of only al- 

 bumen , "its yel- 

 lowish tint having 

 resulted from the 

 evaporating proc- 

 ess which had tak- 

 en place." 



Alany cases of 

 twins and double 

 monsters in fish 

 have been recorded 

 but no case of ap- 

 parent modifica- 

 tion of structure 

 by chemical means 

 in one of the twin 

 fish mentioned. Dr. 

 Chichester fertil- 

 ized the eggs from 

 several female 

 F u n d u 1 i by the 

 sperm of one male 

 and at the proper 

 stage, he added a 

 dilute solution of 

 ether in plain sea- 

 water. Many of 

 the eggs died. Two days later the water 

 was changed for fresh sea-water and a 

 few of the dead eggs were removed. 

 Three days from 

 the beginning of 

 the experiment the 

 dead eggs were 

 picked out, and the 

 remaining few 

 were placed in 

 fresh sea-water. 

 The living eggs 

 numbered two hun- 

 dred and fifteen, 

 and the uncounted 

 dead eggs about six 

 hundred. At the 

 end of six days' 

 time the normal 

 embryos were sep- 

 arated from the 

 abnormal. 



In the first lot 



How quad- 

 ruple eyes 

 grow 



