23 
FLOWERING PLANTS—Continued. 
ARACEZ, — Lemna minor. Passim. 
Arum maculatum. Passim. NAIADER. 
LEMNACEX, Potamogeton natans. Passim. 
Lemna trisulca. ” lucens. River Lea. 
FLOWERLESS PLANTS. 
' FILICES. Pteris aquilina. Passim. 
Polypodium vulgare. Ophioglossum vulgare. 
Lastrea Filix-mas, Passim. OPHIOGLOSSACEX. 
Equisetum arvense. Passim. 
METEOROLOGICAL OBSERVATIONS. 
On May 19th, 1873, Mr. Brapsy and Mr. Henstxy presented to 
the Society the following Meteorological Instruments, by Negretti and 
Zambra :—Glaisher’s eight-inch rain-gauge, a maximum, a minimum, and 
a wet and dry bulb thermometer. WE Suave was appointed: to record 
observations with these instruments. This was first done with the rain- 
gauge on May 22nd, the maximum and minimum thermometers on June 
18th. The direction of the wind at 9 a.m., on June 22nd. The tempera- 
ture of the air at 9 a.m.,on Octoberthe 7th. During the summer holidays 
a record was kept of the rain by the Master, and in his absence by the 
Porter ; but a few days at the beginning and end of that period are 
Wai . 
aa to the incompleteness of the statistics which have been collected 
this year, it has been thought unnecessary to publish them. It is to be 
hoped that they may be kept quite completely for next year. If this 
should be accomplished, they have a scientific value, quite indepen- 
dently of their local interest. Professor Maxweut tells us that “the 
most important step in the progress of every science is the measurement 
of quantities. Those, whose curiosity is satisfied with observing what 
Beppens, have occasionally done service by directing the attention of 
others to the phenomena they have seen ; but it is to those who en- 
deavour to find out how much there is of anything, that we owe all the 
great advances in our knowledge.” Thus the only wer ty which a 
satisfactory system of meteorology is likely to be constructed, is by the 
collection of a great number of accurate measurements ; and it is to this 
end that we shall be contributing our share. 
Although complete statistics will not be given, it is thought that a 
few remarks on the nature of the instruments and on the weather 
my prove not uninteresting. In Negretti and Zambra’s own words, 
“The gauge is age inches diameter, and arranged for the reception of the 
water only which falls upon its receiving surface, and for the preven- 
tion of loss by evaporation. The rain is first collected in a funnel, the 
