This Manual is placed in the hands of the teachers in the hope that the suggestions which it contains on lesson topics, materials, books of reference, and methods in teaching will be found helpful to all teachers and in particular to those who have had little or no instruction in Nature Study during their academic or professional training. The first Chapter of the Manual discusses topics which have general reference to the subject as a whole. The remaining part of the Manual deals more particularly with the subject in its application to the different Public and Separate School Forms. While this division of the matter into Forms is convenient for general classification, it is not to be regarded as arbitrary. Materials and methods of presentation suitable for one class of pupils in a certain Form might, under different conditions, be quite unsuitable for another class of pupils in the same Form. For example, work which would be suitable for a class in Form I made up of pupils admitted to a school at seven or eight years of age, after two years' training in a kindergarten where nature lessons received special attention, would not be suitable for a Form I class made up of pupils admitted to a school at five years of age with no such previous training. In selecting work for any class the teacher, therefore, should not be guided solely by the arbitrary divisions of the Manual, but should exercise his own judgment, taking into account his environment and the attainments of his pupils. To facilitate such a selection, page references are given in the details of the Course of Study, which in reality forms a detailed expansion of the Public and Separate School Course in Nature Study. By means of these references, the teacher may find, in any department of the subject, typical matter suited to the development of his pupils. The numerous type lessons that are contained in the Manual are intended to suggest principles of method that are to be applied in lessons upon the same and similar topics, but the teacher is cautioned against attempting to imitate these lessons. This error can be avoided by the teacher's careful preparation of the lesson. This preparation should include the careful study of the concrete materials that are to be used. The books, bulletins, etc., that are named in the Manual as references will be found helpful. To facilitate teaching through the experimental and investigation methods, special attention has been given to the improvising of simple apparatus from materials within the reach of every teacher.