He claimed that he could get photosynthesis to take place without visible light by administering an energy “kick” from hydrogen (whatever that meant).
"In place of light, they supplied the initial energy 'kick' with hydrogen gas, known to be a powerful electron supplier." "The result was the production of reduced pyridine nucleotide by chloroplasts (that is, the build-up of a key store of chemical energy) entirely in the dark." Is The Bible Really the word of God? - 1969 p.23
This is also referenced in the old "Aid" book pp 1630-31.
George