I ?2 Society of Antiquaries. 



is detailed, which, though he favs it was coarfely conducted, 

 leads him to conclude that the focus of heat falls at the di- 

 flance of half an inch from that of light. One hundred and 

 feventy experiments are recorded, from whence he concludes, 

 that, as the laws of the motion of light and heat are ellen- 

 tially different, there is the greatelt reafon to conclude that 

 they are not the fame fluid. 



The Croonian lecture, on the irritability of the nerves, by 

 Everard Home, was begun reading the fame evening, and 

 concluded at the following meeting on the 20lh. Jn this 

 paper Mr. Home denies the hypothecs of a peculiar nervous 

 fluid. 



SOCIETY OF ANTIQUARIES. 



\ 



Thurfdav, Nov. 6, the Society met for the firft time fince 

 the fummer vacation ; on which evening, and on the 13th 

 and 20th, feveral very curious fragments of the paintings from 

 the walls of St. Stephen's chapel, representing various fub- 

 jects from the books of Job and Tohit, were exhibited ; and 

 a very curious memoir on the fubjeet, by their learned Se- 

 cretary, was read. The Prefident addrefled the Society, and 

 informed them that the Society had appointed a committee 

 for the purpofe of fuperintending the execution of drawings 

 which were making of all the curious remains that have been 

 difcovered during the alterations that were carrying on at 

 St. Stephen's chapel, and which of late had excited loch 

 general curiofitv among all claiTes of people. 



SOCIETY OF NATURAL HISTORY AT PARIS. 



C. Haiiy lately read before the Society a note on the cryf- 

 tallilations of iron ore. The intended publication of a treatife 

 on mineralogy by this author having induced him to revife, 

 with orreat care, what he had written on cryftallifation, he 

 found that he had rectified only in part the incorrcetnefs into 

 which he had fallen in regard to the cryftalliue forms of iron 

 ore. 



He had already announced, in an extract from his treatife, 



that the cryftals of volcanic iron were not fegments of the 



regular oetaedron, as believed, and that the difference be- 

 to i ' 



Uveen their angles and thofe of thefe fegments was more than 



12 de- 



