Letter by H C Russell, 6 October 1870
October 6th 1870
I will pay the cost of covering the Evaporator. It is not necessary to bring it indoors when it rains and will interfere with the results, as it was intended to receive the rain and being like the rain gauge 8 inches in diameter to extract the weight of rain from the weight of Evaporator. If however ?? ?? sufficient rain should fall to overfill the evaporator you must then put out all in excess of lbs?? gross weight ?? the weight of water evaporates, put into the glass measure will give you the evaporation in inches.
The Humidity for the 21st is 45 as shown by my Humidity scale. I think you have taken the wrong difference it is 11.3.
When the Index Line cuts between two Table lines we take the nearest or estimate the fraction and enter it as a decimal of the Humidity thus if index line came between 45 and 46 Humidity lines but nearer to 45 than 46 we should call it 45 or 45.4 or .3 according to the proportion. I have not been able to learn where you can ?? ?? but think if you send to Braddock?? and ask him he will get it from Melbourne for you. I hope to send you ?? ?? (more instructions??) soon.
Have you got a yard in which I could take Magnetic and other observations? Please let me know as I want to pay Goulburn a visit for that purpose soon.
H. C. Russell
?? Delgarno Esq
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