| I. | II. | |
| Density before fermentation | 1053 | 1038 |
| Density after fermentation | 1004 | 1013 |
| Degrees of density lost | 49 | 25 |
| —— | —— | |
| Grains of sugar per fluid ounce | 49 | 25 |
If it be desired to bring out the result as so much per cent., this is accomplished by multiplying the number indicating the “density lost” by the coefficient 0·23. Thus, in the first of the above examples, 49 × 0·23 = 11·27; and in the second 25 × 0·23 = 5·69, which are amounts of sugar respectively per 100 parts.[250]
[250] Roberts.
In taking the densities Dr Roberts advises the operator to employ a urinometer having a long scale, since the degrees are much further apart than in the scales of the short-stemmed instruments, and are therefore more distinct and can be more easily read off.
The following are examples of diabetic urine:
No. 1 (Simon).
| Specific gravity | 1018· |
| Water | 957·00 |
| Solid constituents | 43·00 |
| Urea | Traces. |
| Uric acid | Traces. |
| Sugar | 39·80 |
| Extractive matter and soluble salts | 2·10 |
| Earthy phosphates | 0·52 |
| Albumen | Traces. |
No. 2 (Dr Percy).
| Specific gravity | 1042· |
| Water | 894·50 |
| Solid constituents | 105·50 |
| Urea | 12·16 |
| Uric acid | 0·16 |
| Sugar | 40·12 |
| Extractive matter, and soluble salts | 53·06 |
No. 3 (Bouchardat).