61* Royal Society, 



the one employed by Professor Daniell, and described by him in 

 his paper recently presented to the Royal Society, and published 

 in the Philosophical Transactions ; namely, the interposition of a 

 thin membrane between the two metals in the voltaic circuit, so as 

 to allow of the separation of the different fluids applied respectively 

 to each metal : the fluid in contact with the zinc being a mixture 

 of diluted sulphuric and nitric acids ; and that in contact with the 

 copper being a solution of sulphate of copper. The author re- 

 serves for a future paper the details of the results he has obtained, 

 with regard to the relations between the intensity of effect, and the 

 extent and disposition of the metallic surfaces : but states that he 

 has obtained powerful electric action by bringing the membrane 

 into contact with the zinc; the latter having no acid applied to it, 

 and the only fluid employed being the solution of sulphate of cop- 

 per. 



14. Anonymous Essay, entitled "Scoperta della Causa Fisica del 

 Moto." Presented to the Royal Society, with a view to obtaining 

 one of the Royal Medals for 1836. 



The Author commences by an historical review of the opinions 

 of almost every philosopher, both ancient and modern, who has 

 treated of the subject of motion, from Pythagoras to Le Sage: and 

 proceeds to state his own ideas relating to the cause of motion, 

 founded on the hypothesis that the ultimate atoms ol" all matter 

 have a pyramidal figure. 



15. " An Experimental Inquiry into the Modes of Warming and 

 Ventilating Apartments." By Andrew Ore, M.D., F.R.S. 



The Author, having been consulted by the Directors of the 

 Customs Fund of Life Assurance, on the mode of ventilating the 

 Long Room in the Custom House, and deeming the subject one of 

 great public interest, was induced to lay the result of his observa- 

 tions and experimental inquiries before the Royal Society. In this 

 room, about two hundred persons are busily engaged in transacting 

 the business of the Institution. All these persons are found to 

 suffer more or less from ailments of the same general character, the 

 leading symptoms of which are a sense of fulness and tension in the 

 head, flushing of the face, throbbing of the temples, giddiness, and 

 occasional confusion of ideas, depriving them of the power of dis- 

 charging their duties, in which important and frequently intricate 

 calcuhitions are required to be gone through. These symptoms of 

 determination of blood to the head are generally accompanied by 

 coldness and languid circulation in the feet and legs, and by a feeble, 

 and frequent, as well as quick and irritable pulse. On examining 

 the air of the room by appropriate instruments, the author notices 

 more especially three circumstances in which it differs from the ex- 

 ternal air: first, its temperature, which is maintained with great 

 uniformity within a range of 62° to 64°; secondly, its extreme dry- 

 ness, which, on one occasion, measured by Daniell's hygrometer, 

 was 70 per cent. : and thirdly, its negatively electrical state, as in- 

 dicated by the condensing gold-leaf electrometer. In all these 

 qualities the air respired by the inmates of the room bears a close 

 resemblance to the pestilential blasts of wind which, having passed 



