342 Mr. Goldifigham's Report [Nov. 



one or two more lunations. If astronomers were to divide the 

 lunar disc into a number of small portions, and each to observe 

 his own part regularly, using large and powerful instruments, I 

 am certam, and I speak from a long continued series of obser- 

 vations with large telescopes, that much valuable knowledge 

 may be obtained. I should have great pleasure in taking a 

 portion of the moon along with other astronomers. 



J. B. Emmett. 



Article V. 



Report of the Length of the Pendulum at the Equator, By John 

 Goldingham, Esq. FRS. From Experiments and Observations 

 made on an Expedition Jitted out under his Direction, from the 

 Observatory at Madras : by Order of the Madras Government 

 in the Year 1821. Together with a Deduction of the Figure 

 of the Earth, by combining the Equator, Madras, and London 

 Experiments. Also the Geographical Situation of different 

 Places seen on the Eocpedition. 



{Concluded from p. 299.) 



On the 22d of December, the observations, having more 

 immediate reference to the primary object of the expedition, 

 may be said to have commenced. At the island Gaunsah Lout, 

 a slight shock of an earthquake was felt on the 30th of Decem- 

 ber, which lasted about half a minute. On the 10th of January, 

 Captain Crisp arrived from Nattal, finding the pillar com- 

 menced, and the observations for the latitude, time, and longi- 

 tude going on. On the 21st, Captain Crisp arrived again from 

 Nattal, and on the 23d proceeded to Ayr Bongy : the con^ 

 ductor, whose health rendered it necessary, left the small island 

 for Pulo Panjong. The pillar, having the plugs of teak-wood 

 inserted according to the instructions, was finished on the 27th ; 

 there not having been bricks sufficient, the foundation and 

 back-part of the pillar were formed of pieces of the coral-rock, 

 which was found to be very hard, and at least equal to brick for 

 the purpose. On the 31st of January, the plank and frame for 

 supporting the pendulum of experiment were firmly secured in 

 their places; the clock-case was then screwed to the plank. 

 On the 2d of February, Captain Crisp arrivel from Nattal ; the 

 works of the clock were put up, and on the 5th, observations 

 taken for finding its rate. On the 7th, Captain Crisp returned 

 to Nattal in the brig Eleanor, having seen that every thing was 

 in a proper train for commencing the experiments with the pen- 

 dulum. On the 11th, three of the savage inhabitants of these 

 parts, who came here under the pretence, or for the purpose, of 

 fishing, got into the large tent, and took from thence the transit 



