July 28th 1858
There will be sent to you this day via Grafton (to the care of Mr Shoveller) a maximum shade thermometer requiring no erection.
Allow me to suggest that the striking of the Index in the minimum thermometer may perhaps be prevented by inclining the Instrument a little, so that the descent of the Index may be assisted by its own weight. It is important that the self registering Instruments should be so attached to the stand as not to shake in windy weather –
I may also mention that we do not expect from our observers hourly returns on 21st of the month; indeed you are the only one who has made the attempt; such returns can only be reasonably expected where there are two or more observers to divide the watches between them.
Your obedient servant