Transcriber's note:
Minor typographical and punctuation errors have been corrected without note. Irregularities and inconsistencies in the text have been retained as printed.
The cover for the eBook version of this book was created by the transcriber and is placed in the public domain.
On pages 84 and 85 there are two items both of which are numbered LXXXVIII. The table of contents reflects the same.
In the table of contents the following page numbers have been changed to match the book:
Page lxxxii:
33. A Needle Alphabet—39 changed to 38
38. A Sieve Alphabet—ibid. changed to 41Page lxxxiv:
79. A total locking of Cabinet Boxes—78 changed to 77
80. Light Pistol Barrels—ibid. changed to 78