Un el presente trabajo, los autores hacen una rese&ntilde;a de los m&eacute;todos utilizados para la determinaci&oacute;n de cera de lana. M&eacute;todos cl&aacute;sicos y m&eacute;todos r&aacute;pidos. Tambi&eacute;n mencionan algunos sistemas nuevos que deben ser todav&iacute;a experimentados.<br /> Hacen un estudio de los diferentes solventes y realizan una comparaci&oacute;n de varios de ellos frente al cloruro de me- ti&iacute;eno.<br /> Gr&aacute;ficos, tablas, etc., completan el trabajo.<br /> Por &uacute;ltimo se dan una serie de conclusiones y un enfoque nuevo de la orientaci&oacute;n que se debe seguir para el an&aacute;lisis de lanas, l&iacute;quidos, barros, etc.In the present work the autors give a review of the me- 1hods used for the determination of the wool wax: classical as well as rapid ones. They also mention some new systems which already are to be tested.<br /> They make a study of the different solvents and make a comparison of many of them with methylene chloride.<br /> Charts, tables, etc., complete the paper. Finally a series of conclusions are given and a new point of view is established which is to be followed for the analysis of wools, liquids, muds, etc.