Experimental results are presented for neutron emission from cells that used several methods for deuterium loading of Pd and Ti metal samples. Most experiments have given negative results on the level relevant for a 5–6 per cent efficient NE213‐based detection system that has an average background of 0.5 n/m. Positive indications of weak neutron emission have been observed with a set of five Pd‐Ni electrolytic cells that use considerably more Pd than is usually the case. Three of these five cells produced a positive indication in a recent experiment which used a completely different type of neutron detector situated in a deep mine for an environment free of cosmic rays. While the present experiments do not constitute a proof of neutron emission in cold fusion, the evidence for the effect is encouraging. It must be demonstrated that other cells can be constructed that utilize the same type of material, and that the effect can be scaled up to higher levels.