436 Minerals. 



Planta (JOSEPH). [1744-1827] 



Principal Librarian of the British Museum [1799-1827]. 



Presented, in 1807, a crystal of boracite, in gypsum, from Liineburg, 

 Hanover. 

 Poushkin (Count APOLLOS DE MOUSSIN). 



Included in Hatchett's (q.v.) collection, which was purchased in 1799, 

 were many Russian specimens, which he had received from Count 

 Poushkin ; a manuscript list of them is preserved in the Department. 



Prudhoe (Lord, afterwards th Duke of Northumberland). 

 See NORTHUMBERLAND (Algernon Percy, 4th Duke of). 



Raikes (J. M.). 



Presented, in 1824, gold with aikinite, in quartz, from Beresovsk, Urals. 

 Raisin (Dr. CATHERINE ALICE). 



Presented, in 1896, a series of granites, sandstones, camptonitic dyke- 

 rocks, etc., from Egypt, collected by Mr. G. F. Scott Elliot, and has pub- 

 lished descriptions of several collections of rocks presented to the Museum. 



Ridley (HENRY NICHOLAS). [1855- ] 



Assistant in the Botanical Department of the British Museum [1880- 

 1888]. 



Presented, in 1887, about 200 specimens of phonolites, basalts, etc., 

 which he had collected in the Island of Fernando Noronha. 



Rochon (Abbe ALEXIS MARIE). [1741-1817] 

 Distinguished as an astronomer and navigator. 

 Presented, in 1790, atacamite (" copper-sand ") from Atacama, Chili. 



Rodriguez (Dr. Jos SANTOS). 



A large series of leucitic lavas and tuffs from the neighbourhood of 

 Rome, collected by him, was purchased in 1894. 



Rose (GUSTAV). [1798-1873] 



Professor of mineralogy at the University of Berlin. 



Fifty-eight crystals, which had belonged to his private collection, were 

 purchased in 1895. 



The British Museum Collection of Minerals was re-arranged (1858- 

 1862) by Mr. Maskelyne according to Rose's crystallo-chemical system. 



Royal Society. 



The Delta Boring Committee presented in 1897 a series of specimens 

 (with sections) of the deposits of the Nile Delta, obtained during the 

 boring operations at Zagazig undertaken by the Royal Society. 



Ruskin (Prof. JOHN). [1819-1900] 



Slade professor of Fine Art in the University of Oxford. 

 Presented, in 1850, two specimens of fluor (" the Coutte rose-fluors ") 

 from Switzerland ; in 1865, several large specimens, including a polished 

 mass of Iceland spar, harmotome from Strontian, chessylite from Chessy, 

 a long branch of crystallised native copper from Lake Superior, celestite 

 from Sicily ; in 1884, about 50 specimens of agate and chalcedony (which, 

 when arranging a case to illustrate the " Forms of Silica," he presented to 

 supplement the specimens in the collection) ; and, in 1887, the " Colenso " 

 diamond, a large yellowish octahedron, weighing 130 carats (27 grams), 

 and the " Edwardes " ruby (corundum). 



