the 

 th 



STALACTITES, STALAGMITES, ETC. 



31 



us 



in s 



watu 



prints 



1. — Stalactite from Carboniferous limestone, and stained UrpER 

 of a red colour by iron. — Forest of Dean. 



>rati 0n « 



2. — Calcareous Deposit formed in eighteen months, 



Wall-case 40 



(1 j n t i f round the outside of the plunger-barrel of a pump used for 



\f a *> $c. 



itic 



t ev 



penda: 



feeding the boiler of a steam engine. The water was a very 

 pure limestone stream, mixed with that flowing from the 

 mine levels. — Penydarren. 



y * geridge. 



Presented by Mr. M. Mog 



■e formed 

 water on i 



3. — Longitudinal polished section of a large stalactite, 

 shewing the mode of formation, by the deposit of successive 



re. Presented 



ie trequen; layers of calcareous matter. 

 ^ of the w by Prof. Tennant, F.G.S. 



ighly char 



Derby sh 



4. 



lostly extii Forest of D 



Carbonift 



es in 



the Ik 



the agency 



5. — Stalactitic carbonate of lime, obtained in 1804, 



fine," Derbyshire. — Presented by 



from the 



1 protect it Richard Phillips, F.R.S. 

 the for* Nos 1, 3, 4, 5 are placed in the positions in which 

 a the open they were formed in their natural pendant state. 



6 — Calcareous deposit, formed in the interior of an 

 earthenware pipe. 



7. — Long columnar stalactite, composed of concentric 



ems 



of pla: 



s become 



. s j . layers of carbonate of lime. 



oil) 



, formed 



e 



Kos 



18 i 



Bl 



STO^' 



P 



ure 



car 



) 

 ) 



) 



8. — Carbonate of lime deposited in the interior of a 

 lead pipe. 



8a. — Laminated deposition of carbonate of lime, from 

 the interior of a wooden pipe. Taken from a mine supposed 

 to have been closed 100 years — Presented by the Rev. 

 John Gunn. 



9. — Stalagmite, or stalactite, formed by the deposition 

 of carbonate of lime upon botryoidal chalcedony. — Aden. 

 Presented by the East India Company. 



10.— Concretionary stalactite, from Matlock, Derby- 

 shire. 



11. — Stalagmite (carbonate of lime) radiating crystals, 

 producing a mammillated surface. 



No. 10 is hung in the pendant position of a stalactite, and 



