PHILOSOPHICAL TRANSACTIONS. 



329 



YOL. LXII.] 



in tlie Madurah country, taken July 8, 1764. Here a is symbol of the universal 

 deity, bb two hooks of iron, to suspend a kind of throne, on which the deity 

 or swamy often sat, when exhibited to the adorers. 



XXP'. An Account of the Flowing of the Tides in the South Sea, as observed on 

 board His Majesty's Bark the Endeavour. By Lieut. J. Cook, Commander. 

 p. 357. 

 Mr. Cook says, that from many circumstances and observations, he is fully 



convinced that the flood comes from the southward, or rather from the s. e. 



Names of places where observed. 



Success bay in strait le Maire 



Lagoon island 



Matavai bay, Otalieita 



Tolago bay, east coast of New Zealand 



Mercury bay, n. e. ditto 



River Thames, ditto 



Bay of Islands, ditto 



Queen Charlotte's Sound, Cook's strait. New Zealand. . 



Admiralty bay, in ditto 



Botany bay, coast of New South Wales 



Bustard bay, ditto 



Thirsty sound, ditto 



Endeavour river, ditto 



Endeavour's strait, which divides New Guinea from 

 ' New Holland 



} 



XXFI. An Account of a New Electrometer, contrived by Mr. JVm. Henly, and 

 .-, of several Electrical Experiments made by him, in a Letter from Dr. Priestley, 

 F.R. S., to Dr. Franklin, F. R. S. p. 359. 



In my history of electricity, and elsewhere, says Dr. P., I have mentioned a 

 good electrometer, as one of the greatest desiderata among practical electricians, 

 to measure both the precise degree of the electrification of any body, and also 

 the exact quantity of a charge before the explosion, with respect to the size of 

 the electrified body, or the jar or battery with which it is connected; as well as 

 to ascertain the moment of time, in which the electricity of a jar changes, when, 

 without making an explosion, it is discharged by giving it a quantity of the con- 

 trary electricity. All these purposes are answered, in the most complete manner, 

 by an electrometer of this gentleman's contrivance, a drawing of which I send 

 you along with the following description. 



The whole instrument is made of ivory or wood, exhibited in fig. 3, pi. 7, is 

 an exceedingly light rod, with a cork ball at the extremity, made to turn on the 

 centre of a semicircle b, and so as always to keep pretty near its limb, which is 

 graduated: c is the stem that supports it, and may either be fixed to the prime 



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