th an opening at the end for the water to
escape. This chamber evidently represents the bath. Portions of the
dividing walls of the different chambers have also been discovered,
together with various bones, teeth, horns and ornaments, but very few
coins. It is probable that an alteration in the plans of the house which
was about to be built on the spot will be made so as to preserve all the
more interesting features of these remains in the basement. These
discoveries were made at a depth of only two or three feet from the
surface of the ground, and are within about a quarter of a mile of other
Roman remains which were similarly brought to light a few months ago.

* * * * *

[Continued from SUPPLEMENT, No. 830, page 13110.]

GUM ARABIC AND ITS MODERN SUBSTITUTES.[1]

[Footnote 1: A paper read before the Society of Chemical Industry,
London, 1891. From the Journal]

BY DR. S. RIDEAL AND W.E. YOULE.

Subjoined is a table giving the absolute viscosity of various gums. A
comparison of the uncorrected viscosities with the corrected shows the
great importance of Slotte's correction for dextrins and inferior gum
arabics; in other words, for solutions of low viscosity, while it will
be observed to have little influence upon the uncorrected [eta] obtained
for the Ghatti gums and the best samples of gum arabic.

TABLE OF ABSOLUTE VISCOSITIES OF 10 PER CENT. GUM AND DEXTRIN SOLUTIONS.

---------------------+--------------+------------+----------
Sample. | [eta] | [eta] | Z Water
| Uncorrected. | Corrected. | = 100.
---------------------+--------------+------------+----------
Gum arabic.......... | 0.1876 | 0.1856 | 1,233
Cape gum............ | 0.1575 | 0.1555 | 1,029
Indian gum.......... | 0.0540 | 0.0470 | 311
Eastern gum......... | 0.0689 | 0.0639 | 417
Gum arabic.......... | 0.0550 | 0.0480 | 317
Senegal............. | 0.0494 | 0.0410 | 271
Senegal............. | 0.0468 | 0.0380 | 251
Senegal............. | 0.0627 | 0.0557 | 364
Gum arabic.......... | 0.0511 | 0.0430 | 285
Water............... | 0.0149 | 0.0124 | 100
Ghatti.............. | 0.2903 | 0.2880 | 2,322
Ghatti, 5 per cent.. | 0.0903 | 0.0828 | 688
Ghatti, 5 per