416 



REPORT 1900. 



ZOMBA. 



All observations have been corrected for instra- 

 mental errors, with the exoeptiou of the readings of the 

 barometer, the Kew certificate for which does not extend 

 beyond 27'5 in., the correction for 28'00 in. and 27-5 in. 

 amounting to 0'006 in. This amount might fairly be 

 deducted from the entries in the table. 



Mr. McClounie has reduced the barometrical readings 

 to 32° F., to mean gravity at lat. 45^ and to sea-level, on 

 the assumption that the cistern is 2,948 feet above sea- 

 level. This assumed altitude yields a mean pressure of 

 2n-7G3 in. (.January, 29-639 in. ; July, 30-311 in. for 1898 

 and 1899.) The corre iponding values, according to Buohan's 

 Ch.art in Bartholomew's ' Physical Atlas,' are 29-96,29-80, 

 and 30-10 in. 



Force of Wind. 



The total wind force was 711 (mean 0-G9) as compared 

 with 1,058 (mean 98) in 1898. The number of calms was 

 732 (in 1898 667). Out of 300 winds recorded, as many as 

 226 came from the E., N.E.. and S.E. (total force 568 ; 

 mean force 2-51), as compared with 65 from theW., S.W., 

 and N.W. (total force 132 ; mean 2-03). 



The greater calmness of the atmosphere, the increased 

 cloudiness, and the decrease in the hours of sunshine are 

 accountable for the greater Immidity in 1899, which was 

 81 p.c<, as compared with 75 p.c. in 1898. 



Wind and Temperature. 

 A combination of these two elements yields the fol- 

 lowing results :— 



Tear 



Direction 



of wind I No. of 

 1899 ; obser- 



!Vations 



North and 210 



North-east 

 West and I 60 



South-west 

 Calms . 718 



Mean 

 Temp. 



73 

 71 

 66 



Rainv Season ' 



No. of 

 Obser- 

 vations 



86 



49 



358 



Mean 

 Temp. 



75 

 73 

 70 



Dry Season 



No. of 

 Obser- 

 vations 



Mean 

 Temp. 



124 72 



11 ' 64 



360 I 63 



' Rainy season : November to April. Dry season : May 

 to Octol)er. The N.E. descends from Mount Zomba. 



Lauderdale. 



The observations are published as recorded, but there 

 is no reason to believe that the instruments now in use 

 are out of order. 



Force of Wind. 



The total wind force was 1,767, as compared with 695 

 in 1895 ; but wliilst in the latteryear ' calms ' were entered 

 531 times, there were only 51 such entries in 1899. 



Out of 799 'winds' recorded, as many as 344 came 

 from the S.E. (total force 940, mean 2-7), and 227 from 

 the N. (total force 404, mean 1-8). Of all winds that 

 from the S.E., which enters through the gap of the 

 Kilimani road, is the strongest and also the coolest. See 

 Report for 1897, Kilimani. 



Wind and Temperature. 

 A 'combination of the two elements yields the follow- 

 ing results : — 



Direction 

 of wind 

 1899 



N. 



N.E. 



E. 



S.E. 



S. 



S.W. 



W. 



N.W. 



Calm 



Year 



Rainy Season ' 



No. of 



Obser- , ™ „ 

 vations' T^^^P- 



Mean 



No. of 

 Obser- , _ 

 vations' Temp. 



Mean 



Dry Season ' 



No. of 

 Obsei-- 

 vatious 



122 

 15 

 36 



204 



15 



1 



10 



Mean 

 Temp. 



63 

 64 

 70 

 62 

 70 

 85 

 68 

 67 



' Rainy Season : Nov., 

 Season : May to October. 



Dec, Jan. to April. Dry 



Port Herald, Lat. 16-67'', Long. 35-25°, Alt. 

 100 feet. Observer : IT. J. Morris. 



Month and No. 

 of Days 



1899 

 January (24 days) 

 February (14)* . 

 March (20) . 

 April (25) . 

 May (14) . 

 June (27) . 

 July (22) . 

 August (14) 



Mean Temp. 



7 



A.M 



85-2 

 77-4 

 80-5 

 77-9 

 60-9 

 60-2 

 67-4 

 68-1 



2 



P.M. 



100-5 

 92-0 

 92-1 

 89-0 

 78-2 

 71-3 

 81 8 

 85-0 



9 

 P M 



85-4 

 10-0 

 80-1 

 71-0 

 71-3 

 G4-1 

 71-4 

 74-0 



1 

 82-3 

 83-2 

 77-2 

 71-9 

 64-9 

 73-0 

 75-3 



Rain 



a 



In. 

 2-73 

 17-72 

 3-80 

 3-60 

 1-50 

 1-50 

 •50 



No. 

 6 



13 

 6 

 7 

 S 

 7 



<u ^ 



w 



In. 



1-05 



7-60 



1-70 



2-50 



•50 



•50 



•30 



Chiromo, Lat. 16 52°, Long. .86-17°, Alt. 125 feet. 

 Observer: Lewis C. Way. 



Month 



1899 



January 

 February 

 March . 

 April . 

 May . 

 June . 

 July . 



Mean Temp. 



7 



A.M. 



79-3 

 77-3 

 77-9 

 75-2 

 68-2 

 64-6 

 65^1 



2 

 P.M. 



98-4 

 89-1 

 94-7 

 95-7 

 86-1 

 84-3 



9 

 P.M. 



79-8 

 77-4 

 76-7 

 75-4 

 66-2 

 163-1 

 88-1 66-3 



84-3 

 80-3 

 81-5 

 80-4 

 71^7 

 68-8 

 73-9 



Rain 



c 

 a 

 o 



a 



< 



In. 

 1-70 

 15-83 

 3-24 

 1-62 



•59 

 1^30 



•31 



No. 



6 

 22 

 13 



8 



6 

 10 



5 





In. 

 ■45 

 5-97 

 -83 

 -48 

 -19 

 -40 

 -11 



C a 

 "5 



Hrs. 

 332 

 82 

 293 

 196 

 175 

 126 

 223 



The temperature in the shade rose to 100° on 18 days 

 in January, 5 in February, and 5 in March. 



ManffoeJie, 14-5° S., 35-7° K, i,975 feet. Ob- 

 server: C. Percival. 



Month 



1899 



May 

 June 

 July 

 September 



November 

 December 



Mean Temp. 



Bain 



Amount Days 



In. 



0-17 



•00 



? 



3^06 



11^73 





 1 



2? 

 11? 



o - >- 



O O) rf 



?1f 



al 



3-3 S =3 



ai «^ O H 



■a ^ " " 



o S a> 



Fragmentary Rainfall Observations, 

 Nyasaland, 1899. 



Blanhjre. Nov. 6-38 in. ; December, 8-82 in. 

 Fori A)idrrso?i (Mlanje). January, 6-11 in.; 

 February, 20-87 in. ; March, 19-84" in. ; June, 

 3-47 in. ; July, 8-32 in. 



Foti Lister (Mlanje). April, 2-5 in. ; May, 

 7-00 in. 



Liwondf (Upper Shir6). January, 4-55 in. ; 

 February, 19-74 in. ; March, 0-72 in. ; Decem- 

 ber, 6-01 in. 



Dppp H<t7i. Jan. 1-99 in. ; February, 2-22 in. 



Mi-oma, Angoni L.and (11-6° S., 34-6° E.), 

 3,700 feet. February, 11-40 in. 



h'a)7ibola, Tanganyika. January, 9-61 in.; 

 February, 5-34 in. 



