Or if the sun is shining you could measure the height of the barometer, then set it on end and measure the length of its shadow.
或者，如果天气晴朗，你可以测量气压计的高度，然后把它立于地面，再测量它的影子的长度。
2
The length of the string plus the length of the barometer will equal the height of the building.
绳子的长度加上气压计的长度，就等于该摩天大楼的高度。
3
Or if the skyscraper has an outside emergency staircase, it would be easier to walk up it and mark off the height of the skyscraper in barometer lengths, then add them up.