EIGHT YEARS OF THE NEW EAETH THERMOMETERS. 



295 



tain all the data which the Earth Thermometers can give on this interesting question, 

 and which may be worked out in the future with fuller success by other scientists, — I 

 should not scruple to confess, that to my limited view the testimony of the Earth- 

 Thermometer curves is totally at variance with the " New Sun-Spot " curves, — unless the 

 latter, mere telescopic phenomena of visibility, be allowed to precede their heating effects 

 on the earth — whether by slowly producing first an intenser condition of Solar radiation, 

 or otherwise, — by about the space of 9 months ! 



This may seem at first a very extravagant idea, but is evidently of the same order of 

 time effects, as the oftener proved case of Lightning and Aurora, described under head 9 

 and pages 284 and 285 of my longer paper on Mean Scottish Meteorology in the R.S.Ed. 

 Transactions. While here, it must be confessed that the three thermometers hang con- 

 spicuously together in testifying, that a remarkable change from a downward to an upward 

 period of Earth temperature did begin about June 25 or 26, and lasted nearly a year. 



C. P. S. 



Table I.— PRACTICAL CONSTANTS FOR THE NEW EARTH THERMOMETERS ERECTED AT 

 ROYAL OBSERVATORY, EDINBURGH, IN JUNE 1879, AND EXAMINED IN APRIL 1888. 



Names 



of 

 Therm. 



Original 

 Depth of 

 Centre of 

 Bulb from 

 Surface of 

 Rock. 



Surface of 

 Soft Filling 

 up Ground 

 Found in 

 1888 Below 

 Rock sur- 

 face. 



Therms, 

 in 1888 

 Found 

 Sunk Be- 

 low their 

 Former 

 Positions. 



Present 

 Depths of 

 Centre of 

 Bulbs Be- 

 low Rock 

 Surface. 



Length 

 of 1° F. 



in 

 Indies, 

 nearly. 



Possible Scale 



Readings of 



Uniform Wide 



Bore, between 



Readings actually taken. 



Dates of Reaching. 



Max. 

 N. Phil. 

 Corrects., 



ever 

 Applied 

 to the Old 

 Therms. 



Occasional 

 Differences 

 of the New, 

 by Reason 

 of Super- 

 annual 

 Cycles. 



A Max. 



Mean of 

 several 

 years. 



A Min. 



Max. 



Min. 



tl 



tz 



tl 



Inches. 

 250 



125 



50 



25 



Inches. 



2-7 



for all 



these 



Therms. 



Inches. 

 



2-5 



7-0 



9-5 



Inches. 

 250 



127-5 



57-0 



34-5 



Inches. 

 2-0 



1-5 



0-9 



0-6 



50-2 and 42-5 

 52-5 ... 40-9 



58-5 ... 39-0 

 at earth 



59-5 ... 37-0 

 at earth 



47-10 

 49-00 

 52-50 

 55-00 



46-29 

 45*93 



4S-83 

 4577 



45-20 

 43-00 

 39-80 

 37-50 



Dec. 2 

 Sep. 30 

 Aug. 21 

 Aug. 5 



June 13 

 April 9 

 Feb. 13 

 Feb. 8 



0-03 

 0-06 

 0-12 

 0-25 



0-65+ 

 1-05+ 

 1-65+ 



2-08+ 



th 

 Air 



1 "below 

 6 above 







 



1 below 

 6 above 



0-3 

 0-1 



80-0 ... 20'0 

 115-0 ... 0-0 



60-0 

 66-0 



45 -2 

 46-8 



31-0 

 28-0 



July 20? 

 July 10? 



Jan. 27? 

 Jan. 17? 











2-7 

 2-6 



