production of aviation fuels. Beyond that it must be noted that particularly in the case of the production of aviation gasoline on an Iso-octane basis, hardly anything was given to the Americans, while we gained a lot.

“The conditions in the buna field are such that we never gave technical information to the Americans, nor did technical cooperation in the buna field take place.” A further fact must be taken into account, which for obvious reasons did not appear in Haslam's article. As a consequence of our contracts with the Americans we received from them above and beyond the agreement many very valuable contributions for the synthesis and improvement of motor fuels and lubricating oils, which just now during the war are most useful to us, and we also received other advantages from them.

"Primarily, the following may be mentioned:

“(1) Above all, improvement of fuels through the addition of lead-tetraethyl and the manufacture of this product. It need not be especially mentioned that without lead-tetraethyl the present method of warfare would be unthinkable. The fact that since the beginning of the war we could produce lead-tetraethyl is entirely due to the circumstances that, shortly before, the Americans had presented us with the production plans complete with experimental knowledge. Thus the difficult work of development (one need only recall the poisonous property of lead-tetraethyl, which caused many deaths in the U. S. A.) was spared us, since we could take up the manufacture of this product together with all the experience that the Americans had gathered over long years. 

“(3) In the field of lubricating oils as well, Germany, through the contracts with America, learned of experiences that are extraordinarily important for present day warfare.”