The presence of acetyl groups in histones

the sensitivity of the detection apparatus. As only part of the soil nitrogen is present in living microorganisms, it appears that the conversion of 2,6- dichlorobenzaldoximes is brought about by micro- organisms and not, or very slowly, by higher plants. SUMMARY 1. Soil micro-organisms convert a range of 2,'6-dichlorobenzaldoximes into 2,6-dichlorobenzo- nitrile.