
          West Point December 22nd - 1842.


 My dear Sir,


 Mr. Baily has kindly suggested to me
 that you would, if requested to do so, order for me
 a constant battery, such as you caused to be made
 for him. I am desirous of getting one of about
 10 elements, arranged in a box with cover, to
 protect it from dust etc. when not in use. I
 intend it for Ampére's "Electro-dynamic apparatus"
 and therefore it should be as portable, and as conveniently
 devised as practicable with clamps to 
 hold the conductors which connect with the 
 apparatus. 


 If you will be so kind as to order this for me 
 & give such suggestions as may occur to you, I 
 shall esteem it a particular favor. I know not 
 when I shall be able to get it from the city, but 
 if you will drop me a note stating when it may 
 be had, I shall take the earliest opportunity to send 
 for it.


 I beg you to present my kind remembrance to 
 Mrs. Torrey, & believe me, very truly, your friend


 W. H. C. Bartlett
        