70 



INDEX. 



N. 



Negretti and Zambra's self-regis- 

 tering thermometers, 7. 



0. 



Olmsted on the aurora, 52. 

 Ombrometer, or rain-gage, 17. 

 Order of observations, 35. 



P. 



Parhelia and paraselenes, 34. 

 Periodical phenomena, 40, 63. 

 Phillips, maximum thermometer, 7. 

 Plants, list of, 65. 



" phenomena of, 63. 

 Psychrometer, placing, 8 



" observation, 8, 38, 



45. 

 " verification, 9. 



R. 



Rain 20, 30, 34, 38. 



Rainbows, 34. 



Rain-gage, 17, 20, 21, 22. 



Record of observations, 43 



Reductions, 39, 40. 



Register of observations, 35, 37, 43. 



Registry of periodical phenomena, 

 63 



Reptiles, observations on, 67. 



Rutherford's self-registering ther- 

 mometer, 7. 



s. 



Self- registering thermometers, 5. 



Shooting stars, 35. 



Sky, 27, 34. 



Sleet, 31. 



Snow, 19, 23, 31, 38. 



Snow-gage, 19, 23. 



Special directions to observers, 43. 



Spirit thermometer, 6. 



Storms, 31, 32. 



T. 



Thermometer, placing, 1. 



" reading, 3. 



" verification, 4. 



Thermometer, self- registering, 5. 



" placing, 5. 



reading, 5, 33, 38, 44. 



" verification, 5. 



Thunderstorms, 31. 

 Time of observations, 35. 

 Tornadoes and land-spouts, 32. 



Y. 



Vernier, 14, 59. 



w 



Wet and dry bulb thermometer^ 8. 

 Whirlwinds, 32. 

 Winds, 25, 26, 33, 38, 45. 

 Wind-vane, 24, 25. 



