According to Dr. Gerald Hawkins' theory, what might people gather to observe at Stonehenge?

According to Dr. Gerald Hawkins' theory, people would gather at Stonehenge to observe and predict the eclipses including the movement of the moon all year round and summer-solstice sun rising over the heel stone. The stone monoliths would have been used to compute the timing of the eclipses.

In the British Scientific Journal Nature, Dr. Hawkins wrote about Stonehenge in 1963.

uses : -

1.aneroid barometers primarily measure whether pressure is rising or falling.

2.aneroid barometers are often used for reading pressure in homes and recreational boats.  

3.other uses may include barographs in meteorology and altimeters in modern aircraft.  

4.this type of barometer can announce whether a high or low pressure system is coming or whether it is becoming more intense.  

5.there are different types of aneroid barometers, such as the altimeter, which measures altitude, or distance above sea level.  

6.another example is a barograph, which is a modified aneroid barometer that provides constant readings of atmospheric pressure on graph paper.  

7.when used in this capacity, the aneroid barometer can store a week's worth of data.

android diameter a device for measuring atmospheric pressure , often specially calibrated for use as an altimeter ,consisting of a box or chamber partially exhaused of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the external air

refer to the attachment for the characteristics : -

is there a year set? the question is incomplete