[USER=3]@dreamer042[/USER] does the book mention how frequently he came back to use the same color??? So intrigued to read this; clearly seems to indicate that something other than chemical make up (something non-physical) was influencing the experience.

Do we know what kind of coloring? I wonder if the side effects that we now know are produced by food coloring, were simply being enhanced by the LSD? I suppose that is a possibility as well.