In this paper we present, apparently for the first time. various measurements on a mixture of hydrogen and oxygen called HHO gas produced via a new electrolyzer (international patents pending by Hydrogen Technologies Applications. Inc. of Clearwater, Florida), which mixture is distinctly different than the Brown and other known gases. The measurements herein reported suggest the existence in the HHO gas of stable clusters composed of H and 0 atoms, their dimers H-O. and their molecules H-2. O-2 and H2O whose bond cannot entirely be of valence type. Numerous anomalous experimental measurements on the HHO gas are reported in this paper for the first time. To reach their preliminary. yet plausible interpretation. we introduce the working, hypothesis that the clusters constituting the HHO gas constitute another realization of a recently discovered new chemical species called for certain technical reasons magnecules as well as to distinguish them from the conventional "molecules" [Santilli RM. Foundations of hadronic chemistry with applications to new clean energies and fuels. Boston. Dordrecht. London: Kluwer Academic Publisher: 2001]. It is indicated that the creation of the gaseous and combustible HHO from distilled water at atmospheric temperature and pressure occurs via a process structurally different than evaporation or separation. thus suggesting the existence of a new form of water, apparently introduced in this paper for the first time. with the structure (H x H)-O where "x" represents the new magnecular bond and "-" the conventional molecular bond. The transition from the conventional H-O-H species to the new (H x H)-O species is predicted by a change of the electric polarization of water caused by the electrolyzer. When H-O-H is liquid, the new species (H x H)-O can only be gaseous. thus explaining the transition of state without evaporation or separation energy. Finally, the new species (H x H)-O is predicted to be unstable and decay into H x H and O. by permitting a plausible interpretation of the anomalous constituents of the HHO gas as well as its anomalous behavior. Samples of the new HHO gas are available at no cost for independent verifications. including guidelines for the detection of the new species. (c) 2005 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.