Meteorological Observations. T-59 



Therefore the effect of these bodies is equivalent to the addition 

 of 117 grains to the 2000 grains of water, or ^Vth has to be added 

 as a correction to all the temperatures obtained by this instrument ; 

 or, in other words, the multiplier must be increased from c!ij to 66 

 in this instrument, and in all similar ones where the weights ot the 

 mercury and glass of the thermometer, and of the iron vessel, are 

 the same as stated above. 



As the piece of platinum is the most expensive part ot the appa- 

 ratus, it is proposed to use a small piece of baked Stourbridge clay 

 as a substitute for the platinum. The author has found, by experi- 

 ment, that a piece of Stourbridge clay, 200 grains in weight when 

 heated to the melting-point of silver, and plunged into the tinned 

 vessel containing 2000 grains of water, raises the temperature ot 



the water 41°. . x u j- -a^a 



Now, if 1890° Fahrenheit (the melting-point of silver) be divided 

 by 41, we obtain 46° as the number corresponding to 1 of this 

 pyrometer; and 46 will therefore be the correct multip her ; and no 

 corrections are required for any heat abstracted by the thermometer, 

 the tinned vessel, or the piece of clay. 



The temperature of all sorts of furnaces and flues of steam- 

 engines, &c.. may be readily ascertained by means of the piece ot 

 Stourbridge clay.— Proceedings of the Institution of Mechanical hn- 

 gineers, Birmingham. 



METEOROLOGICAL OBSERVATIONS FOR JUNE 1853. 



Chmvick.-inyxtX. Clear and fine. 2. Cloudy: fine : rain. 3- Cloudy 4 

 Overcast- fine: clear. 5. Very fine : slight ram. 6. Rain : clear at mght. 

 ?. Constant rain. 8. Thick whitish haze flow fog in the evenmg: heavy ra.n 

 9. Excessively heavy rain throughout. 10. Ram: cloudy : clear. 11. O^ercas* 

 12. Slight rain: overcast. 13. Fine: rain at night. 14 Showery. 15- /me^: 

 sh;we|: clear. 16. Rain: uniformly overcast. /^ Clo-ly throughout. 18. 

 Rain • showery ■ heavy rain. 19. Heavy clouds : clear and fine. 20. Overcast . 

 r^i? Rah/:croucy 22-24. Fine' 25. Uniformly overcast : fine : ram a 

 niKht. 26. Rain : heavy showers. 27. Overcast : heavy showers. 28. Fine 

 densely overcast. 29. Overcast: cloudy: clear. 30. Fine: rather wmdy : clear 

 atTght.-More rain fell on the 7th, 8th, and 9th, than on any three consecutive 

 days for at least tweuty-six years near London. 



Mean temperature of the month »° "' 



Mean temperature of June 1851 ^^ ^\ 



Mean temperature of June for the last twenty-six years ... »>" ^i . 



Average amount of rain in June IV/inc . 



£o»/on.-June 1. Fine. 2. Fine : rain p.m. 3 Cloudy : rain am. 4 Fine: 

 rainA.M. 5. Fine. 6. Rain: rain a.m. 7,8. Cloudy. 9- Cl"udy : ram a.m: 

 10, 11. Cloudy : rain a.m. and p.m. 12. Cloudy : rain a.m. 13. Cloudy : ram f m. 

 14 15. Cloudy : rain a.m. and p.m. 16. Rain : ram a.m. and p.m. 17. Fine 

 rain a.m. and p.m. 18, 19. Cloudy : rain a.m. 20. Cloudy : ram p.m. 21. Ram : 

 rain A.M. 22. Cloudv : rain a.m. and p.m. 23-25. Fine. 26. Cloudy : ram a.m.: 

 27. Cloudv. 28. Cloudy : rain p.m. 29, 30. Cloudy. 



Sandwich Mame, Orkney. -im^i 1, 2. Showers. 3 Rajn: f o^"^- 4, o- 

 Bright : clear : fine. 6. Hazy. 7. Hazy : clear : fine. 8. Bnght : fine. 9 Cloudy . 

 damp. 10. Drizzle. 11. Drizzle : showers. 12. Damp: hnght. '3. Clear . 

 fine cloudy. 14. Showers: cloudy: fine. 15. Bright: fine : clear : fine. 16. 

 BrL'ht fine- cloudy. 17. Clear : fine : cloudy. 18. Damp : fog. 19. Bright: 

 cl aV fine 20. Da,l.p. 21. Damp : fog. 22,23. Rain. 24. "^^^j^ ^^right : showers. 

 20. Bright: rain. 27. Bright: showers: fine. 28. Clear: fine: drops: fine. 

 29. Clear : fine : cloudy : fine. 30. Rain. 



