IT ROYAL SOCIETY OF CANADA 
In deriving tidal differences from these observations, it was first 
necessary to ascertain whether any part of the region at the mouth of the 
Bay of Fundy, could better be referred to Halifax than to St. John as 
its port of reference. With this object, a trial comparison was made for 
a period of one month, between the time of high water at Yarmouth, at 
the mouth of the bay, and Halifax on the one hand and St. John on the 
other. The month selected was July 18 to August 18, 1898; and the 
condensed result of the comparison is as follows, when reduced to the 
same standard time :— 
Yarmouth and Halifax. Difference in time of high water varies 
from 2 h. 26 m. to 3h. 0 m. later ; showing a range of 34 minutes. 
Yarmouth and St. John. Difference in time of high water varies 
from 1 h: 01 m. to 1 h. 14 m. earlier; showing a range of only 13 
minutes. 
It thus appears that if the tide at Yarmouth is referred to St. John 
rather than to Halifax, much greater accuracy can be secured ; as the 
error corresponding to the above variation, is only one-third as much. 
It may therefore be concluded from this comparison, that the tides 
throughout the Bay of Fundy above Yarmouth, can best be referred to 
St. John. 
Preliminary results of these observations, including the draught 
available for vessels at ports in the upper part of the Bay, were prepared 
in time for issue with the tide tables for 1900. A full series of tidal 
differences for the whole Bay of Fundy will appear with the tide tables 
issued for 1901. 
TIDE TABLES NOW ISSUED ; AND METHOD OF PUBLICATION. 
Quebec, Halifax, and St. John, N.B—The tide tables for these 
principal harbours were again furnished to the leading British and Cana- 
dian Almanacs, as far as they were willing to publish them. These tables 
give the time and height of the tide, the depth of water on dock sills, 
&e.; and they are accompanied as before by tidal differences by which 
the time of the tide at a large number of other ports, becomes known. 
The manner of publication was the same as described in last report ; 
and it will, therefore, be sufficient to give a list of the almanacs in which 
they appear, in whole or in part :— 
Canadian Almanac.—All the above, in full—The Copp, Clark Co., 
Toronto. 
Greenwood’s Almanac.—All the above, in fullCapt. W. N. Green- 
wood, Lancaster, Eng. 
