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Transcriber's Note
This book contains a large number of line drawn illustrations which are un-credited. These did not reproduce well in this medium and have been re-drawn electronically as close as possible to the original. A number of transcription errors were found in the original book. As these were clearly not part of the Author’s intention they have, as far as possible, been identified and corrected in accordance with the methods given by the Author. These corrections have also been marked with an underline as e.g. construct, so that the original text may be seen by hovering the mouse cursor over the corrected element. In these notes the word ‘natural’ identifies a letter symbol occurring without a prime mark.
In the original book at the top of page 97, the following text occurred: “ [N.B. The numbers at the foot of each page indicate the pages where the corresponding matter may be found.] ” In accordance with the un-paged medium here this has been changed to: “ [N.B. Reference tags for Examples, Answers & Solutions will be found in the right margin.] ”
The part of the book to which this relates contains, by sections, “Examples” (Exercises for the student), “Answers” (to the Examples) & “Solutions” (Worked Answers). All Example sections have corresponding Answer sections. For Sections 2 & 3, worked Solutions are not supplied; for Sections 4–7, Solutions are given by 2 different methods. In association with this, the original text contained editorial notes at the foot of each page giving the page numbers for the related Sections. In this version, these notes are replaced with hyperlinks: for each Section the marginal marker which is given at the top of the Section identifies the current location and by clicking on it the reader is taken on a round tour of the related Sections.