I have get to page 46 seem to me that they are based their theory to one mushroom fly-agaric. Fly-agaric is not popular hallucinogen, Vikings were using it and is possible that is ingredient some other solutions. Common mushroom in north Asia is Psilocybe cubensis,shamanic use,( russian description is from cubensis) and other psilocybes. Cows are eating those too, some species grow at dung fertilized grass field. This can have been big problem when milk is hallucinogenic, same problem than wheat has had Claviceps purpurea, it has made whole village mad. Philocybe is not poisonous and it doesent require vomiting or other processing unlike fly-agaric, what can destroy your inner organs. Normally Philocybe is used as tea, I can imagine that they have made some drink, Soma perhaps, fermented it stays fresh longer, also tastes better than tea from pure mushroom. It looks breast, it has nipple and color is same than Vedic poets. Reference to milk is obvious. This far page 46 has been disturbed one eyed interpretation to one mushroom, what is possible incorrect. I have reached end,here was many refers to Philocybes (Psilocybe) cubensis and semillanceata, best 308, where writer describes growth of semilanceata and call it fly-agaric.And many times telling about grass, semillanceata grow in grass are part of grass pad 4-10 together, grass mushroom is descriptive saying for it, writer still calling it wrong name. Then p.318 hemp and hallucinogenic mushroom, referring to Vedict text and Middel-East "these two plants do not resemble each other",when contrary concentrated cannabis causes hallucinations and is used same aims than mushrooms, to expand consciousness and heal. Soma is commonly understood as cannabis-putter (plus other herbs) tea. This is good example from scientist who is very eager to know (something) but dont know what is writing at.Is clear that fly-agaric is been used for intoxication not for reaching subconsciousness and other healing, meditative purposes, what hallucinogenics are used for. Writer is mixing two different aims here ritual/healing and intoxication. This can be written again and it would be excellent, good base for correcting :) it to handbook to archaic mind. Exploring consciousness.