214 Proceedings of the Royal Physical Society. 
TABLE ITT. 
The Temperature of the Thames at Kingston and Greenwich. 
Kingston.? | Greenwich.* 
August 1892-July 1893. August 1893-July 1894, | 1845-1879. 
Month. B Cc A. B Cc A 
=) a e | l ae | lg = 
aoe | an. igs ou bene | es = Sf Naesteh, Acca oS dee s 
Ala) Ss is2) 5/84/34] S (etl S| se | a] s [ea 
ag) ak Oe a ef =e | ae |S | fel) S 1 Sl 2 eee 
| B11 S led) =| = te) 2) 5 lek) S | oo) Se eee 
a |e |< lae|<| <=] ae | | < jae] < | <= | a | = jae 
| } 
| August, . . | 66°3 4p S| acgd Sc PSE FORM as 75°O | 57-9 || 64-4 | 62°6|+1°8 
September, . | 60°2 es Jose | ee |e. |] 60°5 | 59°8 | 57-2 |-+ 2-6] 66-3 | 50°3 |] 59-9 | 57-9 |+ 2°0 
| October, . . | 49°6 we [ove | ose [e+ |] 54° | 58°0 | Siva [425 58-2 | 46-2 52°9 | 50°7 |-+ 2-2 
November, . | 47°1 ww | we | ee | ce |] 43° | 42°6 | 42-1 |+ 0°5] 45°7 | 38-2 |] 44-3 | 42-3 14 2-0) 
| December, . | 38'S a. ak *. <. [[ 4b? 41°3 | 40°2 |+1°1) 44:1 35°7 || 40°4 | 39°S |+- 0°6 
January, . 362 37°3 | -— 1-4 40°5 | 33°6 || 39°3 | 39°0 | 38-7 | +0°3 41°8 | 35°0 | 39-4 | 38°9 +05 
February, 42°6 | 42-4 | -0°2 48-4 | 37-2 || 42°6 | 42-2 | 41-6 |+0°6 46-6 | 37-4 || 40°7 | 40-4 |+0°3 
March, 47-0 46°5 | 0°0 57°8 | 36-7 || 46°2 | 45-7 | 45-0 |-+ 0-7| 63-8 | 377 || 43°6 | 42-8 |+0°8 
April, . 55°8 52°5 26 650 | 42-2 |) 54°8 | 54-1 | 51-6 |4 2-5) 61-2 | 44-2 || 50-0 | 48-7 413 
May, . 62°1 57-6 |4+3°8 69-2 | 48-4 || 56°1 | 55-4 | 50°7 | 44-7) 597 44-1 || 563 | 544/41°9 
June, . 65 9 62-4 |+2°8 73-3 | 53-1 |] 62-4 | 61-7 | 59°5 |+ 2°2! 68°5 52'1 | 62°6 | 60°6 +20 
July; & = 68-0) 64:2 +31 73°6 | 56:8 || 67-6 | 66-9 | 63-0 |+3°9 71-9 | 56-2 || 65-7 | 639/413) 
| Means, . .|53°3| = || 53-1 | 52°6 | 50°6 |-+ 2°) 57-8 | 44°6 || 51-7 | 502 | +15 
| | | r | I | | 
| } 
August 1894. ss 
64-2 | 63°5 60 6 |+2°9 oss | 647 
1 The Kingston observations were made by myself, those for the river every other after- 
noon under the railway bridge at the hour of maximum temperature (Part I., p. 300), and 
those for the air by self-registering instruments in my back garden, about a third of a mile 
from the river. The air means have been obtained by dividing the sum of the mean 
minimum and mean maximum by two, and applying Marriott’s corrections for Greenwich. 
One of Negretti and Zambra’s Reference Thermometers, certified at Kew, was employed as 
a standard instrument, with which all others were from time to time compared. The 
instruments were lowered to a depth of 18 inches below the surface, and kept there four 
or five minutes. The river means are based on my observations of the diurnal range, to be 
subsequently given. 
2 The Greenwich river observations were made with self-recording instruments on board 
the ‘“‘ Dreadnought” and the police-ships anchored in the stream. The thermometers were 
placed in a perforated trunk attached to the ship’s side, two feet below the surface. The 
air observations are those of the Observatory, 160 feet above the river, but no correction 
has been made. The years 1857 and 1870 are not included in the series (Airy in Proc. Roy. 
Soe. Lond., vol, xxxiv.). 
—— es 
