ON METEOROLOGICAL OBSERVATIONS ON BEN NEVIS. 183 
mean of only two dust particles to the cubic centimetre. During this 
time the high-saturated, high-temperatured north wind was blowing out 
of the cyclone which lay to northward, whilst the sea-level winds were 
south-west, or were blowing in upon the same cyclone. The observations 
already point to a daily maximum during the time of the afternoon mini- 
mum barometer, and a minimum number during the morning minimum 
barometer, or during the times of the great diurnal ascending and descend- 
ing currents of the atmosphere. It is evident that in these observations 
we have indications of intimate relations subsisting between the numbers 
of dust particles and the cyclones and anticyclones over North-Western 
Europe at the time. Itis also made clear that the dust particles vary 
enormously during the presence of mist or fog without being accompanied 
with any difference in the apparent density of the fog. 
It is unnecessary to dwell at length on the prime importance of these 
observations and investigations conducted at the Ben Nevis observatories 
in their relations to cyclones and anticyclones on which our weather 
depends, and the bearing of the whole matter on the framing of weather 
forecasts. To this subject it is arranged that Dr. Buchan’s time will be 
wholly given during next year. In carrying ont this intricate and labo- 
rious investigation, the Meteorological Council send Mr. Omond three 
copies of their ‘ Daily and Weekly Weather Maps,’ on which are to be 
entered certain of the meteorological data from the high and low level 
observatories, and comparisons of those data, together with occasional 
remarks that may from time to time be made as bearing more or less 
closely on forecasting weather. One of thege sets will be sent to the 
Scottish Meteorological Society, and another to the Meteorological Coun- 
cil, while the third will be retained by Mr. Omond at Fort William. 
' The low-level observatory has been equipped by the Meteorological 
Council with a complete set of self-recording instruments, and the regu- 
lar observing work began on July 14. The directors are thus now in the 
best possible position for extending the scientific and practical inquiries 
they have taken in hand by the unique facilities offered by these two 
well-equipped observatories. 
Sith Report of the Committee, consisting of Professors A. 
Jounson (Secretary), J. G. MacGrecor, J. B. CuERRIMAN, and 
H. T. Bovey and Mr. C. CarpMakEL, appointed for the purpose 
of promoting Tidal Observations in Canada. 
Your Committee is happy to be able to report that the Canadian Govern- 
ment has at length undertaken to establish stations for systematic tidal 
observations, and that the calculations for the tide-tables will be made 
according to the method recommended by the Association. It is under- 
stood that the construction of the tables will be entrusted to Mr. Roberts, 
of the Nautical Almanac Office. That the efforts of the Committee were 
not successful earlier is possibly due to the fact that there have been three 
Ministers of Marine in succession since the Committee was appvinted, and 
that the Committee had, in each case, to begin de novo to present the 
facts to the Minister in office in order to convince him persoually of the 
need of the observations for the purposes of practical navigation. The 
