A X 1 



Lat. Temp. 



Geneva * ~+~ f ~~~~~~~*, f ~~~* 46. 12 ~~~~~ 50. 18 



Milan ~~~~~ 45. 28 55. 76 



Marseilles.**, 43. 17 57. 74 



Toulon* 43. 3 ~~^~ ~ 63. 50 



Rome ~~~ ~~^,,~**~~~~~~~~ 41. 53 ~~~~;,~~ GO. SG 



Naples '. 40. 50 ^,~~ 64. 40 



Madrid* 40. 25 59. 00 



Havannah ~ 23. 10 ~~~ 78. 08 



Mexico* 19. 25 62. 60 



VeraCruz* 19. 11 ~~ 77.72 



La Plata* ~~^v~~~~.~v, 2. 24 *~~~~~~~ 74. 66 



Equator at the level of the sea 0. ~~~~~ 80. 60 



Quito* ~* 0. 14 59. 00 



From a general and extensive review of the various experimental 

 data respecting the temperatures observed at different places on the 

 earth's surface, the Editor of the Annales de Chimie deduces the fol- 

 lowing consequences. (Ann. de Chimie, xxvii. 432 ) 



In noplace on the earth's surface, nor at any season, will a thermome- 

 ter raised 2 or 3 metres above the soil, and sheltered from all reverbera- 

 tion, attain the 37 of Reaumur, or 46 centigrade, or 114. 8 Fahrenheit. 



On the open sea, it will never attain 25 Reaumur, or. 31 centigrade, 

 or 87. 8 Fahrenheit. 



The greatest degree of cold ever observed on our globe in the ail*, is 

 40 Reaumur, or 50 centigrade below Zero, (580 Fahrenheit.) 



The temperature of the water of the ocean in any latitude, or at any sea- 

 son, never rises abbve 24 Reaumur, or 30<> centigrade, (86 ft Fahrenheit.) 



AXIS, to find tlie angle at which a curve cuts. (Higman.) 

 Find the value of ~ in the given curve, take y =. o t and we shall 

 get the tangent of the angle required. 



Ex. Let the Equation be y ~ ~ . v tf '~ ~~ **. 



rr du V "' x^ 



Here -_r:r- ; now y ~ o t when a; ~ o, and 



when x ~ a, and the values of -r are 1 and infinite respectively ; 



,", the curve cuts the axis at an angle of 45 at the origin, and at right 

 angles when r a. 



AXIS, rotation of bodies dbeitt See Rotation. 

 37 C 



