books are required.

_Sample Book._--This contains particulars of the samples (marks, &c.),
which are entered by the office-clerk as they arrive. He at the same
time puts on each sample the distinguishing number.

EXAMPLE OF PAGE OF SAMPLE BOOK.

+----------+----------+--------------------------+----------------+
| Date. | Number. | Sample. | Remarks. |
+----------+----------+--------------------------+----------------+
| Feb. 1 | 482 | Tough Copper | For Arsenic. |
| " 2 | X | Piece of Metal | For Ni and Cu. |
| " | 483 | Tough Copper. | |
| " | 73 | Silver Precipitate, | With Letter. |
| | | 4 casks, 24 cwt. 1 qr. | |
| " | 494 | Purple Ore, 200 tons. | |
| " | 1 J.T. | Lead Ore, 1 J.T. | From Corsica. |
| " | 2 J.T. | " 2 J.T. | |
+----------+----------+--------------------------+----------------+

_Laboratory Book._ This is the Assayer's note-book, in which he enters
clearly the particulars of his work--the results obtained, as well as
how these results were arrived at. The calculations should be done on
scrap-paper, and should not be entered, although, of course, detail
enough must be shown to enable the results to be recalculated.

EXAMPLE OF PAGE OF LABORATORY BOOK.
______________________________________________________________