Zine published by Microcosm. This manual for growing mushrooms was first published by the Bureau of Mushroom Industry in the early 20th century, offering readers all the advice they need to obtain the correct materials and start production. From readying the 'spawn,' to maintaining the correct humidity and light conditions, to recipes for their preparation, "How to Mushroom" will teach you everything you need to know. Contemporary readers may find the tone of this zine humorous, dated as it is, but all of the information is just as relevant today as it was when it was first published.