394. 



REPORT — 1901. 



Victoria Nyanza Lake Levels and Rainfall, in Decades — cont. 



In order to elucidate the interesting problems connected with the physical geography of the Victoria Nyanza, it 

 would be necessary to instal rain-gauges throughout its drainage basin, and to establish at least foiir gauges tor 

 measuring the level of tlie lal^e, and to connect tliese gauges by lines of spirit level : a consummation most de^'oucly 

 to be wislieil, though not likely to be realised for a considerable time to come. The observations should, as a matier 

 of course, embrace all atiuospherio phenomena, and more especially atmospheric pressure. 



Victoria Nyanza. — Lahe Levels and Rainfall, Monthly Means. 



Month 



1899 

 January 

 February 

 March . 

 April . 

 May . 

 June . 

 July . 

 August 

 September 

 October 

 November 

 December 



Year 



1900 

 January 

 February 

 March . 

 April . 

 May 

 June , 

 July . 

 August 

 September 

 October 

 November 

 December 



Year 



Ntebc (P. Alice) 



Mean 

 Level 



In. 



2-76 

 3-20 

 2-64 

 2-50 

 4-14 

 4-65 

 3-83 

 0-02 

 4-94 

 7-09 

 8-9S 

 8-61 



- 0-51 



- 6-38 



- 5-4B 



- 4-95 



- 5-53 



- 4-95 



- 3-78 



- 2-GG 



- 2-37 



- 7-86 

 -15-63 

 -lS-75 

 -17-82 



8-13 



Extremes 



Highest Lowest 



In. 



+ 3-97 



+ 6-47 



+ 3-97 



+ 5-47 



+ fi-47 



+ 5-97 



+ 5-97 



+ 2-97 



- 3-03 



- G-03 



- 8-03 



- 7-03 



+ G-47 



I 



- G-03 



- 5-03 



- 4-53 



- 5-53 



- 4-53 



- 3-03 



- 2-03 



- 2-53 



- 5-03 

 -12-53 

 -17-53 

 -15-53 



In. 



+ 2-47 

 + 1-47 

 -t- 0-72 

 + 0-97 

 + 2-97 

 + 3-47 

 + 1-47 



- 3-03 



- 8-03 



- 8-03 

 -1003 



- 9-53 



-10-03 



- 7-03 



- B-03 



- 3-53 



- 5-53 



- 5-53 



- 4-53 



- 3-03 



- 4-53 

 -11-53 

 -17-53 

 -19-53 

 -19-53 



2-03 -19-53 



Fort Thruston (Lubwas) 



Mean 

 Level 



In. 



- 1-04 



- 2-42 



- 2-95 



- 3-30 

 + 0-10 

 + 0-7S 



- 2-92 

 -IMG 

 -16-48 

 -21-42 



-21-5 



-21-5 



-21-5 



-20-5 



-19-5 



-18-90 



-li-S4 



-18-87 



-21-GG 



-26-10 



-30-31 



-26-27 



Extremes 



Highest Lowest 



Port Victoria (Jann.iry to July 1899), 



Kisumu, on Kavirondo or Ngowe Bay 



(Sejitember 1899 to December 1900)" 



Mean 

 Level 



Extremes 



Bain 



I Highest Lowest 



In, 

 + 0- 



- 



- !■ 



+ V 



Amt. 



! High 

 Days I est ' 

 FaU 



In. 



+ 2-47 

 + 0-97 

 + 0-97 

 + 1'47 

 + G-47 

 -I- 5-47 

 + 0-47 



I 



+ 3-20 



- 4-30 



- 4-30 

 + 2-20 



■ 1-30 



- 2-30 



- 1-70 



- 1-80 



- 2-70 



- 0-70 



- 3 30 



- 6-30 



- 4-30 

 -10-30 

 -12-30 



- 5-80 



1 -I- 2-70 



I 



IM. 



0-29 I 



98 I 

 1-02 



0-88 I 



Ojl I 



0-75 



1-50 I 



1-13 : 



1-83 I 



1-84 

 2-51 

 1-30 

 1-83 

 1-05 

 0-91 

 1-06 

 0-85 

 1-04 

 2-35 

 1-96 

 1-35 



2-51 



1899. — At yiehe the lake attained its higliest level on June 8. It stood lowest from November 25-28. Tlif 

 difference between the highest and lowest levels amounted to IG inches. 



1900.— At Mrhe the lake reached its highest level on July 21 and maintained it up to Jidy 28. It stood at its 

 lowest from Novcniber 21 to December 2. The difference betweeji the highest and lowcrtt levels amounted to 

 17-5 inches. During the whole of April the lake steadily maintained its level of 5-63 inches below the level 

 of 1896. 



M, Fort Thruston the lake level was lowest on November 1 2, and highest on June 22, the difference amounting 

 to 14 inches. At Kisumu it was lowest on November 3, highest on May 10, the range having been 27 inches, an 

 amouut accounted for by the position of the gauge in shallow water at tlie bottom of a bay and high M-inds. 



1901. — At Xtthe the lake on June 1 stood 23-43 inches above the level of 189G ; at Kisiiiiin on May 7 it stood only 

 15-16 iuches above that level, as assumed by us ; and on June 28 14-0 inches. 



The bench mark cut on the Camp Tree at the head of Port Florence in 1S98 by Commander B. Whitchouse, ll.X., 

 is 19 feet 11 inches above the zero on the Lake Gauge. 



