Note, The tables, No. I. and No. III. are exactly copied from Dr Arbuthnot, No. XII. and XIII. I have here gone no higher than the sextarius, as that is the greatest measure mentioned by Celsus; it has its name from making the sixth part of the Roman congius.

I would have taken the table of weights from Dr Arbuthnot also, if he had given one accommodated to Celsus; but as he has not, I have composed the following, No. VI. according to the division of Celsus himself, who tells us[ U ], that he divides the uncia, or ounce, into seven denarii, and the denarius into six sextantes.

Besides these, in several compositions our author uses semuncia and sescuncia, that is half an ounce and ounce and half; and to save the reader the trouble of reduction, I have given them also a place in the table.

The accurate Mr Greaves[ V ], from repeated experiments, concluded the Roman denarius to contain 62 grains English Troy weight, from which the proportions of the other weights are determined.

No. V.

Grains.

Scruples.

Drachms.

Ounces.

Pound Troy.

gr.

℈

Ʒ

℥

℔

5760 

or

288 

or

96 

or

12 

==

1

480 

or

24 

or

8 

==

1 

60 

or

3 

==

1 

20 

 ==

1 

1 

Celsus’s weights compared with apothecaries’ weights.

No. VI.

Grains of

Sextan-

Dena-

Semun-

Ses-

Li-

Apothecaries’.

Troy wt.

tes.

rii.

ciæ.

Unciæ.

cun.

bra.

℥

Ʒ

℈

gr.

5208 

or

504

or

84 

or

24

or

12 

or

8

==

1

==

10 :

6 :

2 :

 8 

651 

or

63

or

10 1/2

or

3

or

1 1/2

==

1

—

—

==

 1 :

2 :

2 :

11 

434 

or

42

or

7 

or

2

==

1 

—

—

—

—

==

 0 :

7 :

0 :

14 

217 

or

21

or

3 1/2

==

1

—

—

—

—

—

—

==

 0 :

3 :

1 :

17 

62 

or

6

==

1 

—

—

—

—

—

—

—

—

==

 0 :

1 :

0 :

 2 

10 1/3

==

1

—

—

—

—

—

—

—

—

—

—

==

 0 :

0 :

0 :

10 1/2

1 

—

—

—

—

—

—

—

—

—

—

—

—

==

 0 :

0 :

0 :

 1