Second Kejwrt of the South African Institution. 289.? 



indicated 28° — . Qy deducing the means of the maximum 

 heat and cold, as shewn above, we shall have Q^^.S + as the 

 mean of the former, and 21°.4 — as the mean of the latter, thus 

 indicating a thermometrical range of 114°.2. I have the ho« 

 noiir to remain, yours, &c. 



Archibald Hall, M. D. 



Second Report of the Meteorological Committee of the South 

 African Literary and Scientific Institution. — Read Wth 

 July 1835. 



The Meteorological Committee having proceeded to draw up 

 and circulate a compendious body of instructions for making and 

 registering Meteorological Observations — the same which forms 

 a part of their first Report to this Institution — and having, 

 moreover^ distributed in various quarters copies of the printed 

 forms alluded to in p. 16 of that Report — have received in con- 

 sequence communications from various parts of this colony, in 

 most instances expressing great willingness to co-operate in the 

 observations recommended, but in almost every case complain- 

 ing of the want of meteorological instruments, and in some, re- 

 questing a supply. Your Committee are not without hopes of 

 being enabled in some instances to supply the deficiency. Mean- 

 while they have to acknowledge the receipt of a regular return, 

 according to their printed form, from Captain Wolfe, Com- 

 mandant of Robben Island, of the state of the Barometer, in- 

 terior and exterior Thermometer, Wind, and Weather, at the 

 hours agreed upon, during the whole of January, February, 

 March, and April, of the present year, with the promise of their 

 future regular continuance. In this communication the obser- 

 vations appear to have been made with such regularity, and the 

 instructions of the Committee generally so well attended to, as 

 leads them to regret that the barometer employed should (as 

 appears by the numbers set down) be one capable of being read 

 only to the nearest tenth of an inch, and to render them very 

 desirous to supply a better, A spare barometer l^elonging to 

 the Royal Observatory has been accordingly placed at their dis- 



