196 Peckham and Linton — Trinidad Pitch. 



No. 21 is from the northeast side of the lake near the left limb 

 of the tramway looking south. 



No. 22 is from the northeast side of the lake near the right of 

 the left limb of the tramway loop looking south, about one 

 hundred feet from No. 21. 



No. 23 is from the northwest side of the lake on the west 

 side of the right limb of the tramway loop looking south. 



No. 24: is from the south side of the lake near where the 

 road leaves the lake. 



No. 25 is from the northwest side of the lake on the west 

 side of right loop of tramway looking south near a " blow-hole." 



No. 26 is from the south side of the lake near where the road 

 leaves it, about one hundred feet from No. 24. 



No. 27 is i]puree from the boiling works of the Trinidad 

 Asphalt Co., at Point La Brea. It was made by boiling a 

 mixture of No. 10, No. 8 and No. 9. 



Nos. 6, 7, 8, 9 and 17 represent commercial lake pitch. 



Nos. 16, 21, 22, 23, 24, 25 and 26 represent the contents of 

 the lake occupying the annular space outside the tramway and 

 embracing hundreds of thousands of tons. The area is about 

 60 per cent, of the surface of the lake. 



Nos. 1, 2, 4, 10 and 14 represent an average of commercial 

 land pitch. 



Nos. 5 and 19 represent refined land pitch. 



Nos. 20 and 27 represent refined lake pitch. 



Nos. 3, 11, 12, 13 and 18 are rubbish so far as commerce is 

 concerned, and are introduced here to show that there is rub- 

 bish in the lake as well as outside of it, and also the relation of 

 alteration products to the commercial pitch. 



The locations of the several specimens are shown on the 

 accompanying map. 



No specimens were taken from near the border of the west 

 side of the lake, because the pools of water were so wide as to 

 make it quite difficult to get around among them. These 

 specimens are believed to furnish a fair representation of the 

 pitch as it occurs both within and without the so-called lake, 

 and also the refined pitch and fipuree made from the same. 



As before stated, the condition of the pitch in the entire 

 deposit is that of complete saturation with water. Water is 

 reached everywhere within a few feet of the surface and often 

 stands in the areas from which pitch has been excavated. Both 

 outside and upon the borders of the lake it appears to render 

 the re-filling of the areas less rapid. In and near the center of 

 the lake, the enormous volume of gas constantly rising, forces 

 the pitch into any excavation more rapidly. 



The pitch is removed from near the tramway soon after it 

 is dug, and before it has time to melt is weighed full of water 



