Peckham and Linton — Trinidad Pitch. 195 



No. 8 is from an average from the same piece made up by 

 breaking fragments from many points upon its surface. 



No. 9 is from the center of the lake or near it. The mass 

 was soft enough to flatten in the shade, but did not stick to the 

 paper in which it was wrapped. After drying it became ridged 

 and brittle. 



No. 10 is an average from a large piece taken from an exca- 

 vation being made by the Trinidad Asphalt Co. on the Belle- 

 vue estate near the road leading to the lake. The excavation 

 extended along the road for perhaps 1500 feet and was narrow. 

 The pitch was clean and pure but was covered by rank vege- 

 tation that grew upon and in the pitch itself, and not upon soil 

 that covered it. This fact accounts for the high percentage of 

 organic matter not bitumen, although the piece was taken 

 several feet below the surface. 



No. 11 is a decomposition product of the pitch from the 

 photograph lot. 



No. 12 is another decomposition product from the same lot. 

 It resembled coke and may have been heated. It is the only 

 material resembling coke that we saw in or around the lake 

 and the amount was only a few pounds. 



No. 13 is also a decomposition product resembling No. 11, 

 from the south side of the lake. It was enclosed by a pelli- 

 cle of sun-dried, melted pitch, within which it was of a light 

 brown color with a columnar structure, like starch, and was 

 very easily powdered. It had the external appearance of 

 asphaltene that had been precipitated from solution. 



No. 14 is from a pile of land pitch melting on the beach at 

 Point La Brea, said to have come from the same lot as No. 1. 



No. 15 was brought from the lake about 1865, by the late 

 William Attwood of Portland, Me. 



No. 16 is from the southeast side of the lake inside the road 

 and was cut from the surface at a spot free from vegetation. 

 The point was about half way from the tramway to the border 

 of the lake. 



No. 17 is from the west side about mid-way of the tramway 

 loop, where men were loading tram cars. It was picked up 

 from under the feet of the men. 



No. 18 is iron pitch from the northeast side of the lake near 

 where the left limb of the tramway, looking south, enters upon 

 the lake. 



No.*19 is refined land pitch, from the refinery of the Trini- 

 dad Bituminous Asphalt Co. at Jersey City, N. J. It came 

 from the same lot as No. 2. 



No. 20 is refined lake pitch, purchased in New York of the 

 Warren, Scharf Co. 



