Note 99 — Chapter V · The Alcoholic Ferments.

In these experiments the apiculated ferment appeared sometimes, but much less frequently than saccharomyces pastorianus. We also met with the ellipsoidal ferment. We should probably have a greater variety of ferments if our experiments could be conducted in the open air, but insects and particles of dust of all kinds brought by the wind render experiments under such conditions difficult and untrustworthy. In a laboratory we have not these difficulties to contend against, but, unfortunately, the operations ordinarily carried on there cause the results of our experiments to be of a less general character than they would be if obtained in free contact with country air.