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XIV. On the Meteorological Observations made at the Apartments of the Royal 
Society during the Years 182/, 1828, and 1829. By J. W. Lubbock, Esq. 
V.P. 8c Treas. R.S. 
Read April 14, 1831. 
The phenomena which principally deserve attention connected with the 
science of meteorology, are : 
1. The annual and diurnal variations of the barometer and thermometer, due 
to the action of the sun. 
2. The variations of the barometer due to the moon, and dependent on her 
age. 
3. The comparative temperature and barometrical pressure at different points 
of the earth’s surface, the isothermal lines, and lines of equal barometrical 
pressure. 
4. The influence of the direction of the wind on the temperature and baro- 
metrical pressure. 
5. Phenomena connected Avith the electrical state of the air, the aurora 
borealis, &c. 
In order to determine the annual variations of the barometer, I have taken 
the mean of the observations in each month, made at the apartments of the 
Royal Society, during the years 1827, 1828, 1829, and 1830. The results are 
given in the following Table, which shows the differences from the mean*. 
The two first columns result from these observations, reduced to 32° Fahr., 
and corrected for capillarity. 
The four other columns are deduced from Table 3 in the valuable work of 
M. Bouvard “ Sur les Observations Meteorologiques.” (Memoires de l’Aca- 
demie des Sciences. Vol. vii. p. 312.) 
* The mean result being given for each year separately in the Philosophical Transactions, of course 
it was only necessary for me to add these together, and take the fourth. Since the reading of the paper, 
the observations of 1830 have been added and taken into account. 
