74 



EXPERIMENTS, &c. 



position ; while the sides of the cabin seemed, 

 if not perpendicular, at least much less inclined 

 to the horizon than they were in reality. My 

 body being here supported by the bed, I was 

 consequently without those feelings, which in- 

 dicate its position with respect to the horizon. 

 Objects therefore appeared to me in those situa- 

 tions, in which I had been accustomed to see 

 them. In confirmation of which I may men- 

 tion, that, when I got up, and stood upon the 

 floor of the cabin, the chords seemed perpendi- 

 cular, or nearly so, and the sides of the cabin 

 inclined ; for I was now obliged to exert a pro- 

 per degree of muscular force, to keep myself 

 upright. What I here say, however, is from 

 the recollection of things observed some years 

 ago, when I had no thought of making the use 

 of them I now do ; for which reason, I may 

 possibly have committed some trifling error in 

 stating them ; but none, I believe, sufficient to 

 affect the theory they are brought to support. 



It. being my intention to treat, in the present 

 article, of several facts relative to visible posi- 

 tion and motion, which seem to me to need 

 explanation, without regarding whether or not 

 they depend 5 upon any common cause; I pass 

 to the consideration of the apparent rotation of 

 objects, when we have become giddy, by turn- 

 ing ourselves quickly and frequently round. 



