CO129-446 - Others & Individuals - 1917 — Page 417

CO129 Colonial Office Hong Kong Records 理藩院香港檔案 All AI Reviewed

observations I have made that are good enough

to be used in the construction of new tables for reducing observations of humidity made with the rotating thermometers, which about 30 years ago I introduced for hourly

observations.

5. My earlier observations were a failure, and as in the course of years I gained experience I found the reason to be that they were made within doors, and that the wet bulb ought never to be rotated except in the open air. Indoor hygrometer gave also untrustworthy results, as the Ether by which it is cooled contains a considerable percentage of water, which affects the humidity of the room.

16. All the Enclosed observations (made up of about 10,000 individual observations - 5 years' work) were made by thermometers rotated in the open air and by outdoor air pumped (or rather aspirated) into the hygrometer. They are amply sufficient for the construction of tables but I propose to make further improvement in future. There is no other reason why I have not yet constructed new tables, but there is no occasion to hurry. My new tables were as much required 30 years ago, as they are to day and as is mentioned in His Excellency's letter: such tables should be based on the latest

and most reliable data, or they may be superseded within a couple of years.

412

4. The latest and more reliable data are included but they will most likely be improved within the next few years.

I have the honour to be

Sir

Your most obedient servant

Daher A. Latter Director of the Hong Kong Observatory

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observations I have made that are good enoughto be used in the construction of new tables for reducing observations of humidity made with the rotating thermometers, which about 30 years ago I introduced for hourlyobservations.5. My earlier observations were a failure, and as in the course of years I gained experience I found the reason to be that they were made within doors, and that the wet bulb ought never to be rotated except in the open air. Indoor hygrometer gave also untrustworthy results, as the Ether by which it is cooled contains a considerable percentage of water, which affects the humidity of the room.16. All the Enclosed observations (made up of about 10,000 individual observations - 5 years' work) were made by thermometers rotated in the open air and by outdoor air pumped (or rather aspirated) into the hygrometer. They are amply sufficient for the construction of tables but I propose to make further improvement in future. There is no other reason why I have not yet constructed new tables, but there is no occasion to hurry. My new tables were as much required 30 years ago, as they are to day and as is mentioned in His Excellency's letter: such tables should be based on the latestand most reliable data, or they may be superseded within a couple of years.4124. The latest and more reliable data are included but they will most likely be improved within the next few years.I have the honour to beSirYour most obedient servantDaher A. Latter Director of the Hong Kong Observatory

Baseline (Original)

obsowations I have made that are good moughᄀto be used in the construction of news tables for reducing observations of humidity mada with the rotating thermometers, which about 30 years ago I introduced for hourlyI berriations.5. My sallier observations were a failure, and as in ma cource of years I gamed Ex-the• berince I found the reason to be that they ware made within dools, and that the wil bulb ought never to be rotated meepl In the open air. Illuards hygromitar gavi also untrustworthy results, as the Ether by which it is cooled contains a considerable percentage of water, which affells : the numidity of the room.16. All the Enclored obrowations (made up of about 10.000 individual stroiations _5 years' work) wars mads by thermometers rotated in my opin air and by outdoor air pumped (or rather aspirated into the hygrometer. They are amply sufficiant for the construction of battles but I repack to make further improviment in future. There is no other reason why I have not yet constructed third tables. but there is no occasion to hurry: My new tables wars as much rignirid 30 grais ago, as they are to day and as is minntioned in His Excellency's lanker: such tables should ba basąd on thę latastand most reliable data, or they may be imperseded within a couple of years.4124. The laked and more reliable data are incloud but they will most likely 69 improuid within the hired frus utars.I hows the honour to bęSirYour mout obediant saw and4Daher A Lata Director of theStong Hong Observatory

2026-06-14 01:53:09 · Baseline

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obsowations I have made that are good mough

ᄀ

to be used in the construction of news tables for reducing observations of humidity mada with the rotating thermometers, which about 30 years ago I introduced for hourly

I berriations.

5. My sallier observations were a failure, and as in ma cource of years I gamed Ex-

the

• berince I found the reason to be that they ware made within dools, and that the wil bulb ought never to be rotated meepl In the open air. Illuards hygromitar gavi also untrustworthy results, as the Ether by which it is cooled contains a considerable percentage of water, which affells : the numidity of the room.

16. All the Enclored obrowations (made up

of about 10.000 individual stroiations _5 years' work) wars mads by thermometers rotated in my opin air and by outdoor air pumped (or rather aspirated into the hygrometer. They are amply sufficiant for the construction of battles but I repack to make further improviment in future. There is no other reason why I have not yet constructed third tables. but there is no occasion to hurry: My new tables wars as much rignirid 30 grais ago, as they are to day and as is minntioned in His Excellency's lanker:

such tables should ba basąd on thę latast

and most reliable data, or they may be imperseded within a couple of years.

412

4. The laked and more reliable data are incloud but they will most likely 69 improuid within the hired frus utars.

I hows the honour to bę

Sir

Your mout obediant saw and

4 Daher A Lata Director of the Stong Hong Observatory

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