Allows you to measure the altitude at the spot you're standing on (special menu when a barometer is in your inventory). It is an item with a quality metric (ie. appears in inventory as "Barometer:quality xxxx") - higher qualities improve the altitude measure.
A Barometer is made from 3 Barometric Spheres, 1 lead, 1 glass pipe, 1 water in jugs (the jug is consumed) at a glory hole. You must be signed up for the Test of Life to get this option.
Barometer quality = average(component spheres) - difference(sphere1, average value) - difference(sphere2, average value) - difference(sphere3, average value)
The formula is FALSE. This is what happened to me:
A:7047
B:7114
C:7115
Result: Barometer Q6988
Quality of the barometer affects the accuracy/consistency of the height measurement. How much is currently unquantified (need to get some barometers together and compare). Please add notes here if you experiment.
Indications about correcting barometers' readings in the Altitude Readings guide
proposed testing method
Find a spot where a character receives the "water is too deep message" - This should be elevation 0' 0"
Test with 2 different barometers and 2 different characters moving from 0-0
Try to test several times in same location (characters overlapping as much as possible)
''I have seen only 1k or less quality barometers failing to read the same value on repetition but this was limited
test group Trathien''
| Quality 1 | Elevation reading | Quality 2 | Elevation reading | Percent variance |
| example 4000 | example 5' 0" | example 5000 | example 7' 6" | example +50% |
We can assume higher quality barometers will be more accurate.
We can also assume that there will be a point where the variance of accuracy on the higher quality barometers becomes less critical
We should try to determine a minimum acceptable accuracy value by quality. Barometers of quality less than this would have minimal value.
-> A barometer with an error under 1/4', aka 3" should be enough to work out aqueduct's paths.