II. MINING. 881 



341 6a. General Flan of the Royal Mines of Almaden, 



presented in 1796 by Dr. Diego de Larranaga. Copied by Dr. 

 Enrique Berraejo, at Almaden, in April 1827. 



Royal School of Mines, Madrid. 



3416b. Flan, Outline, and Section of two furnaces for 

 melting quicksilver, copied from those used formerly at the mines 

 of Almaden, by Alesandro Sierra. 



Royal School of Mines, Madrid. 



341 6c. Photograph of the General Flan of the Quick- 

 silver Mines of Almaden, Spain, made in 1796, by Dr. 

 Diego Larranaga. Royal School of Mines, Madrid. 



341 6d. Fhotograph of a Flan made in 1830, by Dr. 

 V. Romero, of Watt's Steam Engine, which was used at 

 the mines for extracting water. Royal School of Mines, Madrid. 



3416e. Fhotograph of a Flan of Furnaces for melting 

 Quicksilver. Royal School of Mines, Madrid*. 



3419. Collection of forty-three Thin Sections of Hunga- 

 rian Trachytes from specimens of the Imp. geologische Reichs- 

 anstalt at Vienna. Voigt and Hochgesang, Gottingcn. 



3420. Collection of fourteen Thin Sections of Rocks of 



Monzoni, according to the researches of Prof. G. von Rath. 



Voigt and Hochgesang, Gottingcn. 



3421. Three Thin Sections of fossil vertebrae of Ichthyo- 

 saurus, Notosaurus, and Squalidarium, according to the 

 researches of Prof. C. Hasse, Breslau. 



Voigt and Hochgesang, Gottingen* 



3334. Flans of the Royal Heinitz-Dechen Coal Mine* 



consisting of 



a. General plan showing position of mine (6 sheets). 



b. Ground plan of the whole mine (6 sheets). 



c. 25 special ground plans (25 sheets). 



d. Profile plan (10 sheets). 



Royal Mining Directory, Saarbriick. 



3335. Transverse Section through the Heinitz and 



Reden mines, respectively through the " Fat Coal " and the 

 "Flame Coal" part of the Saarbriick Coal Basin (7 sheets). 



Royal Mining Directory, Saarbruck., 



3336. Special Geological Maps (2 sheets), section Reden 

 and section Dudweiler. Royal Mining Directory, Saarbruck. 



40075. 3 K 



