The vane is kept with its open end facing the wind, and every increase in the wind pressure is transmitted through it down the vertical tube and through the connecting pipe to the inside of the float, which causes it to rise. This part of the process is pressure.
"The outer perforated tube below the vane is connected by means of the second pipe with the top of the closed vessel containing the float. As the wind blows across the perforations, the air jp the tube is sucked out, with the ffsult that a reduction of pressure takes place in the vessel above the float simultaneously with the increase of pressure within it, This part of the method is suction.
The two forces thus act together but in opposite ways to produce the same results, namely, to raise the float im the water. As the wind-pressure decreases the float fails again by its own weight until an equilibrium, is established between it and the diminished pressure. Under this principle two-thirds of the effect upon the float is caused by pressure, and one-third by suction.
To the top of the float is fixed a rod which passes through. what is practically an air-tight collar in. the. cover of the water vessel; this rod carries a pen, the point of which rests against a sheet of paper attached to a drum which is rotated by a clock.
With every upward or downward movement of the float, corresponding to an increase or decrease of wind force, the pen leaves a trace upon the paper, and thus the amount of every variation in the strength of the wind is graphically registered together with the time of its occurrence, It should be noted that two pens work automatically. If the wind direction shifts beyond a certain point one of the pens automatically Comes into operation. If the wind then changes to the opposite direction, the second pen operates.
further interesting feature the instrument is that attached to recorder is a cylinder indicating precise wind direction at any The "Dines" Anemometer at present in operation at the Observatory is later to be used Victoria Peak, while a second like apparatus is to be installed in the Observatory.
Mr.\Marshall Field, LI, on the 45th birthday in Chicago on Wednesday -inherited the estimated U.S. $100,000,000 estate of the late Mr. Marshall Field, his grandfather. With the accrued interest and. final pay~ ments, he will inherit the entire U.S.$500,000,000 estate on his fiftieth birthday.
Text read from the printed page and cleaned; old type leaves the occasional error.