The near-infrared spectrum of water at various temperatures and in aqueous solutions of Bu,NBr, NaB+,, and +,AsCl is studied in the region 0.8-1.2 p. The spectra are recorded differentially with respect to water by varying the cell lengths as to take into account density changes or the volume occupied by the solutes. A simple analysis of these spectra illustrates the qualitative similarity between the effects of the Bu,N+ ion and that of a temperature decrement on the spectrum of water. On the other hand striking differences are observed in the differential spectra obtained with Bu,NBr and the phenyl substituted salts. Further differences are exhibited in the relative solute-solvent interactions of B+,-and +,Asf.Les spectres de I'eau a diverses tempkratures et de quelques solutions aqueuses de Bu,NBr, NaB+, et +,AsCI ont kt6 examinks dans la region 0.8-1.2 p. Le spectre diffkrentiel (solution us. eau pure) de I'eau est obtenu directement en compensant les variations de densitk ou le volume occupC par I'Clectrolyte en solution par une variation de la longueur des cellules. Une analyse qualitative des spectres dkmontre que I'effet de l'ion Bu4N+ sur le spectre de I'eau est semblable A celui d'un abaissement de tempkrature. Par ailleurs une difference marquke apparait entre les spectres diffkrentiels obtenus pour Bu,NBr et ceux pour les sels contenant des noyaux benzeniques. On observe kgalement une diffkrence dans les interactions solute-solvant des ions B+,-et +,As+.