Transcriber's Note:
Minor inconsistencies in spelling, punctuation and formatting are retained as in the original. Where detailed corrections have been made on the text these are listed at the [end of this document].
Disclaimer:
This is a work of historical interest only and much of the scientific content has been superseded. There are numerous experiments described in this book which are hazardous and should not be attempted. Advice given on handling toxic substances, electrical apparatus etc. should not be followed.
Do not try this at home!