Surveying Instrument Collection
Maker |
Hilger & Watts Ltd., London, England |
Model |
N/A |
Serial Number |
59807 |
Dimensions |
Telescope length 300mm, Height 140mm |
Image |
|
Description |
This is a medium precision tilting level used typically for third-order engineering levelling, area levelling and profiling for earth work computations, stadia surveys and staking in flat terrain. The telescope is supported at its centre by a pivot and may be tilted (up and down) by turning the "tilting screw" which is located on the stage component of the level between the telescope and the base at the eyepiece end. This tilting screw enables the telescope to be precisely levelled before each staff reading, without altering the height of the telescope. The tubular bubble is situated on the left-hand side of the telescope, and features a reflecting mirror built just above the bubble, enabling the observer to rotate this mirror in order to get the best possible view of the bubble. |
History & comments |
The tilting level is an exceedingly convenient instrument when only a very few sights have to be taken at each set-up, but it has the disadvantage that, when a number of sights have to be taken at one set-up, as in taking spot heights for contouring, it has to be levelled for every sight. |
Conservation |
In a wooden box |
Condition |
Good |
Remarks |
|
Dates |
Manufactured in 1949. Catalogued in 1997. |