XXXiv FOURTH REPORT — 1834. 



magh should \>e determined by means of chronometers, or by 

 signals, or by both methods, and that application be made to 

 •Government for their assistance in accomplishing this object. 

 That the Astronomer Royal, Dr. Robinson, Prof. Airy, Prof. 

 Rigaud, Prof. Henderson, Prof. Hamilton, Sir Thomas Brisbane 

 and Lieut. Drummond be requested to carry this recommenda- 

 tion into effect. 



6. That Mr. W. Gray, jun., and Prof. Phillips be requested 

 to continue their experiments on the Quantities of Rain falling 

 on the top of York Minster and other adjacent stations. 



7. That Mr. Peacock be requested to continue his Report on 

 certain branches of Analysis for the next meeting. 



8. That Mr. Whewell be requested to execute for the next 

 meeting the Reports on the Mathematical Theories of Heat, 

 Electricity, and Magnetism. 



9. That Mr. Challis be requested to proceed with his Report 

 on the Mathematical Theory of the Motion of Fluids. 



10. That Mr. Rennie be requested to proceed with his Report 

 on Practical Hydraulics. 



11. That Mr. Willis be requested to prepare his Report upon 

 Acoustics for the next meeting. 



Committee for Chemical and Mineralogical Science. 



The Committee reported that they had received statements 

 of the progress of the experiments on the specific gravity of cer- 

 tain gases, and on the effects of long-continued heat on mineral 

 and organic substances, for which sums of money had been ap- 

 propriated at a former meeting, and recommended the conti- 

 nuance of those appropriations. 



They reported also the following Recommendations : 



1. That Mr. Graham be requested to submit to further investi- 

 gation the amount of security to be derived from the Safety Lamp. 



2. That Mr. Graham and Dr.Williams be requested to investi- 

 gate further the phaenomena of Low Combustion. 



3. That a sum of 10/. be placed at the disposal of Mr. Johnston 

 to defray the expense of preparing a specimen of Chemical Con- 

 stants, in conformity with the suggestions of Mr. Babbage. 



4. ThatDr.Dalton, Dr.Hope, Dr. T.Thompson, Mr. Whewell, 

 Dr. Turner, Prof. Miller, Dr. Gregory, Dr. Christison, Mr. R. 

 Phillips, Mr. Graham, Prof. Johnston, Dr. Faraday, Prof. Da- 

 niell. Dr. Clark, Prof. Cumming, and Dr. Prout be appointed a 

 Committee, to report to the next Meeting their opinion on the 

 adoption of an uniform set of Chemical Symbols ; with power to 

 add to their number. Dr. Turner to be Secretary. 



5. That Dr. Roget be requested to report on the progress of 



