678 SEC. 15. GEOGRAPHY. 



vernruent of Costa Rica. It shows for the first time the geography of the 

 Republic of Costa Rica on a large scale. 



3213a. Map of the Central Fart of the Chain of the 

 Caucasus ; scale, -B^CW M. Ernest Favre, Geneva. 



Geological map of the central part of the Caucasus, executed by M. Ernest 

 Favre from his own observations and extracted from " Recherches geologiques 

 " dans la partie centrale de la chaine du Caucase " (H. Georg. Geneva and 

 Bale, 1875) by the same author. 



3212. Portfolio, containing Maps in Copper-plate Print. 



3213. Portfolio, containing Maps in Lithographic Print. 



^ Bau Deputation, Hamburg. 



3213b. Portfolio, containing reductions of the survey sheets 

 to scale of 1 : 4000, and trigoaometrical chart, scale, 1 : 50,000 

 lithographed. Bau Deputation, Hamburg. 



3213c. Portfolio, containing reductions of the survey sheets 

 n scales of 1 : 1000 ; 1 : 4000, and 1 : 20,000 on copper plates. 



Bau Deputation, Hamburg. 



3215. Portfolio, containing Maps and Drawings. 



Bau Deputation, Hamburg. 



3216. Plan, 1 : 4,000. Sect. IV. galvanoplastic relief plate. 



Bau Deputation, Hamburg. 



3216a. Galvanoplastic Belief Plate of Section IV. of the 

 before-mentioned copper plate pr^nt. Bau Deputation, Hamburg. 



3217. Belief Maps of Bergedorf . 



Bau Deputation, Hamburg. 



3217a. Two Belief Maps, one of the town of Bergedorf and 

 its environs, produced from the lithographed sheets. Longitudinal 

 scale = scale of height = 1 : 4000, the other parts of the area of 

 Bergedorf, produced from the transfer-print sheets drawn for that 

 purpose on cartoon paper. Longitudinal scale = scale of height = 

 1 : 1000. Bau Deputation, Hamburg. 



Explanations. 



As a basis for the survey of Hamburg, the geodetic labours of Councillor 

 Schumacher, Astronomer, are made use of, and in particular the base mea- 

 sured by him in the neighbourhood of Hamburg, in Holstein, in the years 

 1820 and 1821. At the suggestion of the technical adviser of the public 

 buildings deputation, Engineer Lindley, a new survey and drawing of a new 

 map on the scale of 1:250 was resolved upon in the year 1845, chiefly for 

 technical purposes, and the necessary triangulation for that object executed 

 by Dr. A. C. Petersen, under the direction of Schumacher. 



