OF Tllli UNITED STATES. 349 



shifting equatorial motion, mahogany folding stand, steadying 

 rods, and a ianthorn illumination, by means of a small reflec- 

 tor in the centre ; also by Dollond. 



33. One five feet achromatic telescope of TuUy, with a 

 four inch aperture, the tube in two pmts, one terrestrial and 

 four astronomical eyepieces, level, linder, steadying rods, 

 folding mahogany stand, ^'c. 



34. One achromatic telescope of Tullv, four feet eight 

 inches in length, with a three and a iudf inch aperture, tube 

 in two parts, two terrestrial and four astronomical eyepieces, 

 mahogany folding stand, cS"c. 



35. One three and a half feet achromatic telescope, with 

 a three inch aperture, one terrestrial and six astronomical 

 eyepieces, simple brass tube without stand or fnider, by J)ol- 

 lond. 



36. One three and a half feet achromatic telescope, with 

 one astronomical and two terrestrial eyepieces, three inch 

 aperture, brass stand, and steadying rods, by Troughton. 



37. Three double wire micrometers, by Dollond, witii 

 changes of eyeglasses and prisms for high altitudes, to be 

 placed l)eforc the eyepieces, two of tliem tilting the teles- 

 copes, No. 31 and 32, and tiie third the four other teles- 

 copes. 



38. One top joint and socket for a telescope, on three 

 legs of wood, to lit any tekscope, for easy transportation. 



39. Six mountain barometers, with brass mountings, by 

 Mr. Troughton. N. B. Tliese were brought without mercury 

 in them, for greater security against lircaking on the voyage. 



40. Two large thermometers, extending to the boiling 

 point, with Falirenlieit's and FJeaumur's scale, intended for 

 the observatory, by Mr. Troughton, 



41. Two thermometers, on boxwood scales, brass shelter 

 to the balls, also for the observatory. i)y Mr. Troughton. 



4S. Four detached spiiit levels, of two diflTcrent sizes. 



43. Two sets of magnetic bars, one containing two. the 

 other four bars. 



44. One dynamctcr. by Dollond. 



