silliman, jr. to perform an analysis of "rock oil". silliman's report of april stated that "rock oil" could yield an excellent illuminating oil. however, there was no economical means for producing sufficient commercial quantities of oil. bissell had a chance insight when he saw a picture of oil derricks...
p o n d i n g group class subclass title isic hs sitc ------- ------- --------------------------------------------------------------------------------- forming foundry moulds of sand track-laying tractors parts for the goods of classes to parts n.e.c. of boring or sinking ,. ,. machinery and of derricks...
p o n d i n g group class subclass title isic hs sitc ------- ------- --------------------------------------------------------------------------------- forming foundry moulds of sand track-laying tractors parts for the goods of classes to parts n.e.c. of boring or sinking ,. ,. machinery and of derricks...
p o n d i n g group class subclass title isic hs sitc ------- ------- --------------------------------------------------------------------------------- forming foundry moulds of sand track-laying tractors parts for the goods of classes to parts n.e.c. of boring or sinking ,. ,. machinery and of derricks...
p o n d i n g group class subclass title isic hs sitc ------- ------- --------------------------------------------------------------------------------- forming foundry moulds of sand track-laying tractors parts for the goods of classes to parts n.e.c. of boring or sinking ,. ,. machinery and of derricks...
p o n d i n g group class subclass title isic hs sitc ------- ------- --------------------------------------------------------------------------------- forming foundry moulds of sand track-laying tractors parts for the goods of classes to parts n.e.c. of boring or sinking ,. ,. machinery and of derricks...