R. M. Bache on Sea-sickness. 25 



in any respect similar to that of an infant, for I have shown, that 

 the mental picture may conflict with reality, and the blind man 

 has the mental picture — the idea of space — motion — speed — 

 everything— excepting color. Not only are babies not usually 

 afflicted with sea-sickness, but just in proportion to the youth of 

 children, are they exempt from it. Since my own observation 

 indicated what has been asserted in regard to the immunity of 

 babies from sea-sickness, I have enquired of persons of experi- 

 ence, whether their observation tended in the same direction, 

 and I have been confirmed in my belief* 



It has been asked by a friend, to whom I communicated this 

 theory of sea-sickness, whether the insane are sea-sick, and an 

 answer in the negative would certainly seem to corroborate the 

 theory. Thus far, however, I have been unable to ascertain, aa 

 the insane are so rarely allowed to go to sea, that it would require 

 long and patient investigation to determine the point. Immu- 

 nity from sea sickness in a very few cases might be a mere coin- 

 cidence. As far as the answer has been made to my enquiries, I 

 shall give the result. I know of two persons, who, there is every 

 reason to believe never had been at sea until a voyage, when they 

 labored under the "mania a potu." These persons did not be- 

 come sea-sick. Another case of which I have reliable informa- 

 tion, is that of a young girl, who was insane, and who was taken 



* Amontr the latest testinionj which I have received, is a letter written by Cap- 

 tain R. P. Manson of Bath, Maine. This letter is subjoined. Much other testimony 

 has been received verbally, or is my own testimony derived from close observa- 

 tion and comparison during a series of years. The remark that it is impossible, in 

 a carriage in motion in the dark for the occupant to decide in what direction he is 

 sitting in relation to the direction of progress, is one which I heard made by my 

 father many years ago, at a period wlien I was but a child. Memory treasured this 



f my theory c 



others on various points, by merely listening to th _ 



eir descriptions of certair 



1 sensa- 







Letter of Capt. R. p. Mamon. 









Bath, Oct. 14th, 





R. M. Bache, Esq., 

 "Dear Sir .-rour] 











> has been received, and 



Imost 



cheerfully comply wit 



h your request-offering a. 









during thirty years actual s 



■e^rv'^eT^s^'sh^pmas'ter m' 



ost?v"in 



the European business] 



) which you may deem relat 



ive or interesting to that 



subject. 



u^^'.^^z^vani 







infant, 



children from the age of f 











ii?!^'^^^^ 



sddom 



i with many hundred e 





