Meteorological Obser'vations, 231 



ments. However, none of the usual tests are calculated to detect 

 its presence in this excretion. Solution of potash, which is generally 

 sufficient to indicate the presence of sugar in diabetic urine, produces 

 no reaction with epileptic urine. The saccharometer is not of much 

 value, being neither sufficiently sensitive nor convenient. 



The most advantageous and decisive processes are fermentation 

 and Barreswil's liquid. In order to obtain good and trustworthy 

 results with the latter, several precautions are necessary before using 

 it. The urine must be treated first with acetate of lead, which pre- 

 cipitates the other organic substances ; then with carbonate of soda, 

 which removes the lead ; after concentrating the urine, Barreswil's 

 test is added and the liquid boiled. Without these precautions the 

 results are never decisive, and reactions are sometimes produced 

 which would appear to indicate the presence of sugar when the urine 

 does not contain a trace. — Comptes Rendus , January 1853, p. 230. 



METEOROLOGICAL OBSERVATIONS FOR JAN. 1853. 



Chiswick. — January 1. Densely overcast. 2. Rain. 3. Fine. 4. Boisterous, with 

 rain. 5. Fine : exceedingly fine in forenoon : clear at night. 6. Fine : cloudy and 

 boisterous. 7. Rain : boisterous, with constant heavy rain. 8. Fine. 9. Fine, with 

 bright sun. 10. Rain. 11. Clear : overcast. 12. Boisterous, with heavy showers. 

 13. Densely clouded : very fine : clear. 14. Clear: fine: overcast. 15. Rain: 

 clear at night. 16. Fine: rain: hazy. 17. Cloudy: clear at night. 18. Fine: 

 clear: frosty at night. 19. Uniformly overcast : drizzly : very boisterous at night. 

 20. Densely clouded and boisterous : rain. 21. Hazy : cloudy : showery. 22. 

 Cloudy : clear and cold : hurricane, without rain at night. 23. Overcast and cold : 

 clear. 24. Overcast throughout. 25. Foggy. 26. Foggy : fine : cloudy. 27. Fine : 

 densely clouded : rain at night. 28. Overcast : cloudy. 29. Overcast throughout. 

 30. Overcast : rain at night. 31. Clear and frosty : very fine, with bright sun : 

 foggy at night. 



Mean temperature of the month 40°'85 



Mean temperature of Jan. 1852 39*66 



Mean temperature of Jan. for the last twenty-seven years ... 36 '90 



Average amount of rain in Jan 1*68 inch. 



Boston. — Jan. 1. Cloudy. 2. Fine. 3 — 5. Cloudy. 6. Cloudy : rain p.m. 7. 

 Cloudy. 8. Fine. 9. Cloudy. 10. Cloudy: rain a.m. 11, 12. Fine : rain p.m. 

 13, 14. Fine. 15. Rain a.m. 16. Fog: rain p.m. 17. Cloudy. 18. Fine. 19, 

 20. Fine : rain a.m. 21. Cloudy. 22. Fine : rain p.m. 23. Fine. 24. Cloudy : 

 rain p.m. 25, 26. Cloudy. 27. Chiudy: rain p.m. 28, 29. Cloudy. 30, 31. Fine. 

 Sandwick Manse, Orkney. — Jan. 1. Clear a.m. : cloudy, hghtning p.m. 2. Clear 

 a.m. : clear, aurora, lightning p.m. 3. Cloudy a.m. : clear, aurora p.m. 4. Rain, 

 cloudy A.M. : showers p.m. 5. Clear a.m. : sleet-showers p.m. 6. Cloudy a.m. : 

 snowing, aurora p.m. 7. Cloudy a.m. : rainy, aurora p.m. 8. Showers a.m. : 

 showers, aurora p.m. 9. Slfeet-showers a.m. : hail, aurora p.m. 10. Showers a.m. : 

 fine, aurora p.m. 11. Rain a.m. : rain, cloudy p.m. 12. Bright a.m. : dear, 

 aurora p.m. 13. Bright a.m.: showers p.m. 14. Hail-showers a.m.: clear, 

 aurora p.m. 15. Bright, frost a.m. : clear, frost p.m. 16. Frost a.m : cloudy, 

 frost p.m. 17. Bright, frost a.m. : clear, frost p.m. 18. Cloudy, frost a.m. : 

 showers p.m. 19. Cloudy a.m. : showers p.m. 20. Rain a.m. : clear, large halo 

 P.M. 21. Cloudy A.M. : showers p.m. 22. Showers a.m. : hail-showers p.m. 

 23. Clear, frost a.m. : fine, clear p.m. 24. Clear, frost a.m. : frost, clear p.m. 

 25. Bright a.m. : clear p.m. 26 Showers a.m. : frost, clear p.m. 27. Bright a.m. : 

 clear p.m. 28. Clear a.m. and p.m. 29. Bright a.m. : rain p.m. 30. Rain a.m. : 

 showers, aurora p.m. 31. Bright a.m. : fine p.m. 



Mean temperature of Jan. for twenty-six previous years 38°-60 



Mean temperatuie of this month 38*55 



Average quantity of rain in Jan. for seven years previous ...... 4*21 incheSt 



