Xo. 6!{5] 



BODILY ROTATION 



r»31 



cates that the length of their total series was greater than 

 that of any of the other rats. These two subjects were 

 females rotated during the period of gestation. Their 

 rotation was marked by frequent and severe retching 

 movements, defecation, and micturition. The period of 

 gestation of subject "G" was three days short, "(^'be- 

 came too sick during the last reported turning to be used 

 further, and a day later, during which time she did not 

 seem to recover, a litter of two were born. These coin- 

 cidences point directly to the fact that nystagmus is 

 closely related to the organic condition of the individual 

 rotated and they at least suggest the fruitfulness of 

 further work upon this matter. 



2. The fact that the white rat is a nocturnal animal 10 

 suggested that the time of day might make a difference 

 in values. Accordingly two rats, "I" and " J," were ro- 

 tated twenty times twice a day, early in the morning and 

 late in the afternoon. The results were as follows: 



The morning nystagmus is invariably longer, the dif- 

 ference being most pronounced early in the series. Addi- 

 tional evidence of this diurnal difference is being sought 

 with both human and animal subjects. 



3. Other responses than the nystagmus were scrupu- 

 lously noted in our observations. During the first days, 

 most of the subjects showed a tendency to excessive defe- 

 cation and micturition. Frequently the feces were not of 

 the solid character of normal life but were quite liquid, 

 >ugir«'>ting that the rotation had induced some sort of 

 temporary organic shock. This supposition is supported 

 by the facts that neither micturition nor defecation ever 

 occurred late in the series and that the rats, although 



