V. MAPS, ETC. 795 



_ These remarkable results proving the direct measurement, at the same time 

 give authority for reducing the length of the geodetic base to two or three 

 kilometres, that is, whenever they are connected with the sides of the net by 

 means of a system of lines suitable for compensation. This is the first 

 experimental result of the kind given in geodesy. 



PLATES. 



(a.) Measurement of Madridejos wooden gallery formed of nine moveable 

 houses in which the apparatus was sheltered from sun and wind. 



(6.) Plan on scale of 3o * 00 of the country surrounding the base 

 Madridejos with division in sections. 



(c.) Vertical sections of the central base, on a scale of ao * ob , for horizontal 

 distances, and -j-J^. for the heights. 



ADMIRALTY HYDROGRAPHIC DEPARTMENT. 



ORIGINAL (MS.) JOURNALS AND LOG BOOKS, &c. KEPT BY CELE- 

 BRATED ENGLISH NAVIGATORS BETWEEN THE YEARS 1768 

 AND 1825. 



3154. Daxnpier's original MS. Chart of his voyage to New 

 Guinea, 1699-70. 



3155. Cook, Captain James. Journal of the proceedings 

 of H.M. bark the " Endeavour," in a voyage round the world ; 

 performed in the years 1768-69-70-71. Folio. 



3156. Cook, Captain James. Journal of the proceedings 

 of H.M. sloop " Resolution," in exploring the South Atlantic, 

 Indian, and Pacific Oceans, in the years 1772-73-74-75. Folio, 

 with charts. 



3157. Bligh, Captain William. Log of the proceedings of 

 H.M. armed vessel " Bounty." in a voyage to the South Seas, to 

 take the bread-fruit from the Society Islands to the West Indies, 

 in the years 1787-88-89. Folio. Including an account of the 

 mutiny. 



3158. Bligh, Captain William. Log of the proceedings of 

 H.M.S. " Providence," on a second voyage to the South Seas, in 

 the years 1791-92-93. Folio. 2 vols. 



3159. Franklin, Sir John. Log of the proceedings of 

 H.M. hired brig " Trent," in a voyage towards the North Pole, in 

 the year 1818. Folio. 



