220 



Observations of the Magnetic 



[July 



but for all that precedes, the " Supplementary Manuscript" is worth- 

 less. The best that can be said of it is that it is a blank, as five names 

 are a very unsatisfactory provision for the record of 3000 years. Not- 

 withstanding, therefore, Mr. Taylor's favourable opinion of the " Sup- 

 plementary Manuscript," 1 cannot think that it is to be relied on for 

 an insight into the dark periods of Pandya antiquity ; and 1 am satis- 

 lied, that he will find at Madras, amongst the original manuscripts of 

 the Mackenzie Collection, many documents much more worthy of his 

 industry and acquirements. — Journal of the Royal Asiatic Society, 

 No. 6, page 387—390. 



2. — Observations of the Magnetic Dip and Intensity at Madras.— 

 By T. G. Tayxor, Esq. H. C. Astronomer. 



Notwithstanding the value which has of late years been attached to 

 observations of the Magnetic Dip and Intensity, I may, I believe, 

 safely state, that the whole of British India has failed to put on record 

 a single good set of experiments to this end. With a view to supply 

 this deficiency for Madras, I have availed myself of the loan of a very 

 excellent dipping needle, the property of Captain Drinkwater, of 

 His Majesty's ship Conway ; and of two magnetic intensity needles 

 which were brought out by the same officer, and are the property of 

 Captain James Clarke Ross, R. N. The dipping needle, which was 

 constructed on purpose for the Conway, differs, I believe, in no respect 

 from the ordinary construction, save that it is one of the best instru- 

 ments I have met with, and, as far as I can see, absolutely faultless. 

 The observations for Dip are as follows. 



Observations for Dip made at the Madras Observatory, situated in Long, 

 bh. 2lm. 7s. 8 Fast of Greenwich, and Lat. 13° 4' 8". 8 N. on the 

 2Qth April, 1837. 



With Needle marked No. 1. 



Face of Instrument E 2st, 



No. A. 



B. 



No. 



A. 



B. 



1 '7° 26' 



7° 28' 



2 



6" 16' 



6o 14- 



3 7 6 



7 4 



4 



6 12 



6 8 



5 Inverted the axis, 7 24 



7 17 



6 



6 4 



6 8 



7 7 30 



7 24 



8 



6 16 





