276 



Extra Meteorological Observations, 1845. 



NOTES TO THE OBSERVATIONS OF THE SELF-REGISTERING THERMOMETERS. 





d. h. 



Jan. 



4 23 



Jan. 



11 



Jan. 



22 



Jan. 



24 



Jan. 



31 



Feb. 



Mar. 15 5 



. The temperature has risen during the night, so that no minimum could be obtained ; the maxi- 

 mum given for Jan. 4<^ most probably occurred this morning (Jan. S** ) 



The maximum temperature given occurred between 10*^ 19*" and 10*^ 22^. 



The minimum temperatnre seems somewhat uncertam. 



The maximum temperature seems somewhat uncertain. 



The minimum radiation thermometer and the standard thermometer immersed in snow, at a tem- 

 perature of 32° and of 20°, when the former read 0°-l less than the latter. A new coating 

 of lamp-black varnish put over the minimum radiation bulb, which was afterwards roughened. 



About l°-5 of alcohol found detached in the minimum radiation thermometer ; the thermometer 

 was adjusted Feb. 8^ 4:^, and the observations previously were corrected for the induced index 

 error, which has been done in all similar cases. 



The temperature has been varying much and irregularly to-day ; the reading given is quite accu- 

 rate ; the maximum, therefore, probably occurred before 1**. 



There has been no minimum during the night. 



About 0°-7 of alcohol found detached in the minimum radiator ; this must have again joined the 

 column of alcohol, as it could not be seen on the 28th. 



The minimum temperature from the self-registering thermometer lost ; the quantity given is esti- 

 mated from the observations of the dry-bulb thermometer. 



The bulb of the minimum radiator was covered anew with lamp-black, the last coatiug having 

 been nearly washed off by the rain. The maximum radiator was placed about 3 inches above 

 the surface of the soil, and a shade from the wind was placed round it : it has been 1 5 inches 

 above the soil since November. 



About 0°-4 of alcohol found detached in the tube of the minimum radiator ; the bleb was near 

 the top of the tube on May 5, and on May 6"* 5^^ it had disappeared. 



2°' 6 of mercury found detached from the column in the maximum thermometer. 



The index of the maximum thermometer out of order ; the temperature at 27** 2'' was 66°-4 by 



The speculum of the minimum radiator was rcsilvered. [the dry-bulb thermometer. 



The bulb of the minimum radiator was reblackened. 



The mercury and index of the maximum thermometer adhere. 

 1 3"*. The index of the maximum thermometer has probably been adhering to the mercury. 



The maximum radiating thermometer raised 18 inches above the soil, in order to allow the sun 

 to shine more perfectly upon it. 



The minimum thermometer was set at 19^^. The maximum is that since Dec. 29'' 22'\ 



Mar. 

 Mar. 



Apr. 



Apr. 



21 22 

 23 20 



11 



16 



Apr. 30 20. 



July 



July 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



18 7. 

 27 22. 



6 8. 



1 

 30 



10 and 

 25 



Dec. 30 1 



1 



\ 



TEMPERATURE OP WATER IN PUMP WELLS. 



atefl 



Grottingen 

 Mean Time 



of 

 Observations. 



Jan. 



Feb. 



d. 



6 

 13 

 20 

 27 

 3 

 10 

 17 

 24 



Mar. 3 

 10 

 17 

 24 



April 2 



7 



14 



21 



28 



May 5 



Temperature of Water. 



Pump Wells. 



Cottage. 



44-4 

 44-1 

 43-7 

 43-6 

 431 

 42-6 

 42-3 

 42-3 

 42-1 

 420 

 41-6 

 41-6 

 41-9 

 42-2 

 42-5 



431 

 43-7 



Garden. 



47-7 

 47-6 

 47-3 

 47-1 



46-1 

 46-1 

 45-7 

 45-9 

 46-3 

 46-5 

 46-6 

 46-6 

 46-7 

 46-8 



Gottingen 



Mean Time 



of 



Observations. 



d. h. 



May 12 5 



20 



26 



June 2 



9 



16 



23 



30 

 July 7 



14 



21 



28 

 Aug. 4 



11 



18 



26 

 Sept. 1 



Temperature of Water. 



Pump Wells. 



Cottase. Garden. 



440 

 44-6 

 44-8 

 45-2 

 45-4 

 460 

 46-2 

 46-6 

 47-3 

 47-5 

 47-8 

 48-1 

 48-4 

 48-7 

 490 

 49-1 

 49-4 

 49-4 



46-8 

 47-2 

 47-4 

 47-4 

 47-6 

 480 

 47-9 

 48-1 

 48-3 

 48-4 

 48-6 

 48-7 

 48-8 

 491 

 49-2 

 49-4 

 49-9 

 49-7 



Gottingen 



Mean Time 



of 



Observations. 



Sept. 15 

 22 

 29 



6 

 13 

 14 

 21 

 27 



4 

 10 

 17 

 24 



1 



8 

 15 

 22 

 31 



Oct. 



Nov. 



Dec. 



Temperature of Wi 



Pump AVells. 



Cottage. 



49-6 

 49-7 

 49-7 

 49-6 



49-4 

 49-1 

 490 

 49-0 

 48-3 

 47-6 

 47-2 

 470 

 46-2 

 45-5 

 45-0 

 44-6 



Garden. 



49-7 I 

 497 i 

 50-0 

 498 

 50-2, 



50-2 

 50-2 

 500 

 49-8 

 494 

 48.9 

 49.0 

 48-5 

 48-1 

 47'8 

 47-7 



