The cylinder should be tilted so that the plane of the hoops is inclined to the horizontal at an angle equal to the geographical co-latitude, i.e. 90 degrees minus the latitude.
(The cylinder; should be tilted; so that the plane of the hoops is inclined to the horizontal at an angle equal to the geographical co-latitude, i.e. 90 degrees minus the latitude) (the plane of the hoops; is inclined; L:at an angle equal to the geographical co-latitude)
The cylinder the plane of the hoops
should be tilted is inclined
so that the plane of the hoops is inclined to the horizontal at an angle equal to the geographical co-latitude, i.e. 90 degrees minus the latitude
L:at an angle equal to the geographical co-latitude