THESE Notes are intended to furnish a Student with information amply sufficient to enable him to pass the Honours Examination of the Science and Art Department, so far as a knowledge of Building Materials is concerned.

They have, however, been extended somewhat beyond what is actually necessary for this purpose by the addition of Tables and information of a practical nature, which it is hoped may be useful to young Engineers, Architects, and others engaged in the design and erection of structures of different kinds.

It was considered that a work upon materials, written merely to meet the requirements of students in the Second Stage of the Science Examinations, would be unsatisfactory.

Such a work would contain very elementary information on the subject. It would be so condensed that it would not give a fair idea of the great differences which exist in the characteristics and qualities of even ordinary building materials; and being thus narrowly restricted, it would tend to encourage the pernicious practice of cramming.

In order to keep the bulk of the work within reasonable bounds, it has been necessary strictly to limit the scope of the Notes.

It will be well, therefore, to state exactly what they are meant to contain and what is purposely excluded.

They deal with the nature, characteristics, qualities, and defects of the materials used in Building and Engineering works; and they describe the methods of examining and testing such materials.

The information given is restricted to that required by an Engineer, Architect, or Builder, in order to select and understand the materials with which he has to deal.

The principal varieties of building materials used in Great Britain and Ireland are described or noticed, but no reference is made to materials used only abroad - in India or the Colonies.

Descriptions of the manufacture of materials, or of the methods by which they are procured, have been excluded, except in so far as some such knowledge is necessary for an intelligent appreciation of the characteristics of the material.

The actual cost of materials has also, as a rule, been excluded. This varies from time to time, and must be ascertained from the annual Price Books.

The methods of measuring and valuing materials must also be studied in works devoted to those subjects.

It was originally intended to include in Part III. the information regarding stresses in parts of Structures required for the Advanced Course.

The bulk of the volume, however, renders it necessary to reserve these subjects for another Part, which will contain, as far as possible, all the remaining information that is required for the Examinations of the Science and Art Department in Building Construction.