cR 
. OF THE MATTO GROSSO EXPEDITION, 1891-92, 279 
Observations at Cuyabá made by Lt.-Col. Americo Rodrigues de Vasconcellos *. 
Month. 
Jul š 
aoi eed Barometer reduced 
to 00.: 
| 
| 
| 
Min. 745°28 ,, 
Mean 748734. ,, 
bus. 3673 C. (lowest day max. 34^9 C.). 
ES 751:73 mm. 
Temperature in the 
shade: Min. 1405 C. (highest night min. 20^9C.). 
Mean 28*:0 C, 
Average tension of } 12-76. 
aqueous vapour : 
Relative humidity: 53:9. 
Wind: variable on 17 days; N. or N.W. 8 days; S. or S.E. 6 days. 
No rain fell during the month. 
Max. 754-44 mm. 
Min. 741°37 ,, 
Mean 746:24 ,, 
(ns. 39°-9 C. (lowest day max. 17?7 C.). 
August Barometer reduced 
1888. to 0? C. : 
Temperature in the 
: o. a r. i. 
shade : Min. 1075 C. (highest night min. 24”6C.). 
Mean 30?:2 C. 
Average tension of 
aqueous vapour : } - 
Relative humidity : 44-6. 
Wind: N., N.E., or N.W. during greater part of month; S. or S.W. 
on 4 days. 
Rainfall: 0:4 mm. on one day only. 
September | Barometer reduced 
Min. M6 , 
1888. to 09 C. : TA T 
Mean 747:48 ,, 
TS 40^-9 C. (lowest day max. 26°-9C.). 
uo. 747:48 mm. 
Temperature in the 
1 O. * . . > ' 
shade : Min. 2075 C. (highest night min. 27?:1 C.). 
Mean 30?:6 C. 
Average tension 3 904. 
aqueous vapour : 
Relative humidity : 63:8. 
Wind: N., N.E., or N.W. 14 days; S.W.2 days; variable 14 days. 
Rainfall: 52:07 mm. Rainy days 10. 
* * Revista do Observatorio, 1888 and 1889, passim. 
