TAB. LI. 



BITUMEN Gagas. 

 Jet. 



mm ■ !■ i 



Class 1 . Inflammables. Ord. 2. Mixed. 



Gen. 2. Bitumen. Spec. 1. Bitumen with oxygenized carbon. 



Spec. Char. Bitumen combined with about 30 per 



cent, of oxygenized carbon. 

 Syn. Jet. Kirw, 2. 64. 



Jais. Daubenton 30. De Born 2. 79. 

 Variete du Schlakiges erdpech. Emmerl. 2. 50. 

 Jayet. Hauy 3. 324. 



Bitumen Gagas. Linn. Syst. Nat. ed. 13. t. 3. 

 p. 111. 



1 he upper figure represents a curious piece of Jet, remark- 

 able for the remains and impressions of shells about it. It 

 was sent me from Lowestoft by Dr. Smith, President of the 

 Linnean Society. Jet is well known to have been found on 

 the coast at Lowestoft for many years, where amber and 

 curious pebbles are often found. Some fishermen artists of 

 the neighbourhood employ their leisure at convenient seasons 

 to search for them, and form the two first-mentioned into 



