Reading another story, I cannot decipher the meaning of the following phrase:
My hand and arm, reaching up to make sure that the graph was correctly adjusted on my forehead over the pineal gland, seemed to scale a gulf like that of some profound canyon. A carboy loomed like a giant monument.
The protagonist describes his feeling when enduring the effect of a drug.
I tried to look up all meanings of "scale" but none seemed to fit in there.