A rival method to that of the heliometer has been discovered in the photographic telescope.
In 1824 the great Knigsberg heliometer was commenced, and it was completed in 1829.
There are three methods in which this heliometer can be used.
He also invented a heliometer, afterwards perfected by Fraunhofer.
On an entirely different plan is a survey just concluded by Chase with the Yale heliometer.
The heliometer is a telescope with its object-glass cut in half along a diameter.
heliometer observations of distance in their most refined sense cannot be considered absolute measures of angles.
They are obtained from late improved measures of the velocity of light, and from measures by the heliometer.
But there is one instrument of great value, the heliometer, which is not used at Greenwich.
The instrument he is to use should be that marvellous piece of mechanical and optical skill known as the heliometer.