From 1866 to 1880, the rain gauge record kept by Mason at San José shows a yearly average precipitation of sixty-four and one-fourth inches, or 1631 millimeters. It is as follows: The Rainfall in San José from 1866 to 1880 in Mm. -------+----+----+----+----+----+----+----+----+----+----+----+----+----- | J | F | M | A.| M | J | J | A | S | O | N | D | T | a | e | a | p | a | u | u | u | e | c | o | e | o | n.| b.| r.| r | y.| n | l | g.| p | t.| v.| c.| t | | | | i | | e.| y.| | t.| | | | a | | | | l.| | | | | | | | | l. -------+----+----+----+----+----+----+----+----+----+----+----+----+----- 1866 | 33| 7| -- | 29| 139| 123| 320| 156| 274| 250| 171| 122| 1619 1867 | 98| 56| 7 | 98| 209| 206| 214| 190| 314| 213| 244| 14| 1397 1868 | --| --| 181| 13| 83| 150| 102| 130| 224| 393| 144| 17| 1436 1869 | 7| --| 7| 28| 202| 218| 150| 132| 393| 281| 78| 102| 1562 1870 | 1| 6| 31| 17| 333| 276| 240| 284| 240| 262| 184| 33| 1905 1871 | 28| 3| 8| 13| 290| 203| 364| 307| 245| 333| 114| 11| 1925 1872 | 3| 3| 15| 50| 244| 255| 192| 378| 397| 504| 142| 21| 2197 1873 | 64| --| 3| 71| 64 | 205| 145| 85| 387| 262| 121| 11| 1418 1874 | 46| 1| 20| 60| 336| 167| 162| 181| 319| 191| 42| 20| 1543 1875 | --| --| --| 28| 252| 180| 93| 294| 279| 339| 21| 32| 1492 1876 | 14| --| 11| 6| 247| 237| 153| 192| 206| 117| 70| 28| 1282 1877 | 14| --| --| --| 240| 167| 223| 159| 259| 95| 121| 79| 1357 1878 | --| --| 38| 50| 142| 187| 205| 149| 329| 238| 223| 20| 1580 1879 | 13| --| 45| 192| 220| 330| 460| 283| 351| 231| 61| 8| 2193 1880 | 8| --| --| 15| 254| 210| 104| 436| 165| 278| 92| --| 1562 -------+----+----+----+----+----+----+----+----+----+----+----+----+----- Average| 22| 5| 24| 44| 217| 208| 208| 222| 299| 266| 122| 35| 1631 -------+----+----+----+----+----+----+----+----+----+----+----+----+----- There is every year a number of slight earthquakes in San José, generally undulating from west to west-northwest, and occurring mostly between eleven p. m. and six a. m. The greatest number are observed at the beginning of the rainy season.