OF THE MATTO GROSSO EXPEDITION, 1891-92. 281 
Month. 
April 1889. | Barometer reduced 
| in. 741:32 
| to 0°C.: Min. 741:32 ,, 
Mean 745:50  ,, 
T 3778 C. (lowest day max. 21? C.). 
bra. 748:58 mm. 
Temperature in the 
AT: O.« qun G is i o: ae 
ata: Min. 15%3 C. (highest night min. 23%5 C.). 
Mean 29?:5 C. 
Average tension of 
19:95.. 
aqueous vapour : 
Relative humidity : 6658. 
Predominant wind : N. 
Rainfall not entered. 
| It will here be useful to append Dr. Morsback’s * results, obtained at the cost of 
| three years’ observation at Cuyabá, from July 1884 to June 1887 :— 
Highest mean 750-757 mm. 
Barometer : | tows mean 738-740 ,, 
Annual mean 744-745  ,, 
p O. 
f vd Po > Monthly mean { Highest 250 C. Sept. -May, 
Temperature in the ; Mean 26°25 C. A NE: 
shade : Mean temperature at 7 a.m. 21*:9C. 
» ^ » 2 P.M. 88°77 C. 
E - 2 » 9 P.M. 239-06 C. 
Average annual rainfall: 1166 mm. Mean of rainy days: 85. 
A few figures have recently been obtained for Corumbá ; they are here recorded :— 
Observations made at Corumbá by the Matto Grosso Military Engineering Commission 
under Capt. Jorge dos Santos Almeida +. 
apes Max. 751:0 mm. 
More... Barometer : | Mi, 7409 ,, 
1889. Mean 7464 ,, 
Temperature in the ( Max. 36°-4 C. (lowest day max. 2675 C.). 
shade : Min. 17°5C. (highest night min. 2774 C.). 
Rainfall: 189-9 mm. Rainy days: 13. 
Predominant winds: N.E. and N.W. 
Max. 751:1 mm. 
Mec Barometer : E 799'3 ,, mes : 
vbt Mean 7459 .„ 
Temperature in the f Max. 3578 C. (lowest day max. 23°4C.). — 
shade : Min. 18?3 C. (highest night min. 27^5 C.). 
Rainfall: 240-9 mm. Rainy days: 15. 
| Wind : Generally N.E. or N.W. 
* * Revista do Observatorio, Rio, 1890, p. 91. 
T Ibid. 1890, pp. 30, 47, 63. 
SECOND SERTES.—BOTANY, VOL. IV. 2P 
