70 Proceedings of the Asiatic Society. [Feb. 



rological Reporter to the Government of Bengal, I have no doubt that 

 gentleman, as he likewise fills the place of Secretary to the Society, 

 will be able to furnish any further information which may be re- 

 quired. 



I have &c, 

 (Signed) H. L. Thuillier, 



Surveyor General of India. 



Surveyor Genl.'s Office, Calcutta, Vltk Dec, 1867. 



No. 48. 

 From Babu Gopeenatha Sen, in charge of the Observatory. 



To Col. H. L. Thuillier, Surveyor Genl. of India. 



Sir, — With reference to your memo. No. 1642, dated 3rd instant, 

 forwarding for explanation a letter from the Secretary to the Asiatic 

 Society, No. 775, dated 26th ultimo, anent the subject of the 

 Meteorological observations at this office, during the night of the 

 cyclone of 1st and 2nd November, I beg leave to refer you to my 

 letter of the 3rd December, No. 46, wherein, I believe, I have fully 

 explained all the points mooted in paras. 1 to 4 of the Secretary's 

 letter. 



With regard to the 5th para, relating to the Anemometer of this 

 office, I beg to state that shortly after the cyclone of 1864, the 

 instrument was put up on the observatory roof with six supports 

 instead of three as before, with a view that the current of wind may 

 act freely on it. The fixing of the instrument was done under the 

 direction of the Deputy Surveyor General, Col. Gastrell, and the 

 Secretary to the Meteorological Committee, Mr. Blanford. [vide the 

 Cyclone Report of 1864.] 



The cause of the destruction of the Anemometer may be attributed 

 to the leaden sheets on the observatory roof having rolled up and 

 blown against the supports of the said instrument. I need hardly state 

 that at the time of putting these sheets up, every precaution was 

 taken by thebuilders, Messrs. Mackintosh, Burn & Co., to prevent their 

 giving way to the force of a storm or gale. 



I would venture to suggest, that with a view to guard against 



