1832.] British Scientific Association. 309 



absolutely necessary that they should be pursued in different latitudes. The 

 mode of rendering available registers, otherwise almost without value from not 

 being made at the proper hours, will be best illustrated by a reference to the 

 account of the Leith observations. — Transactions of the Royal Society of Edin- 

 burgh, Vol. X. 



II. That the establishment of such an hourly Meteorological Register be 

 pointed out as a highly interesting object, in reference especially to the impor- 

 tant point of intertropical climate, to the Committee of the Association in 

 India. 



III. That the Committee in India be requested to endeavour to institute 

 such observations as may throw light on the phsenomena of the horary oscil- 

 lations of the barometer, near the equator. Should the concurrence of the 

 Committee on these points be obtained, it would probably be desirable that 

 the Association should take measures for sending out delicate and accurate 

 instruments. 



IV. That Mr. Phillips and Mr. William Gray, jun. of York, be requested to 

 undertake a series of experiments on the comparative quantities of rain falling 

 on the top of the great tower of York Minster, and on the ground near its 

 base. The Committee has been induced to propose this specific question in 

 consequence of the local fitness of the situation, and the facilities offered for 

 its solution by the authorities ; but it is to be wished that similar experiments 

 should be made elsewhere, that, by an extended comparison of observations, 

 light may be thrown upon the anomalies which have been observed at Paris 

 and in other places*. 



V. That the Association should express its desire to receive a satisfactory 

 exposition of the theory of the moistened bulb hygrometer, and that observers 

 be also invited to institute series of comparative experiments on the indications 

 of the moistened thermometer and the temperature of the dew point. 



Note. — These indications may be ascertained by Mr. Dalton's process, or by 

 Mr. Daniell's hygrometer, or by both. Notwithstanding the ingenious and 

 laborious researches of Hutton, De Saussure, Leslie, Anderson, and Gay Lussac 

 upon this subject, scientific deductions drawn from more extended experiments 

 are greatly wanted. The simplicity and certainty of the experiment by which 

 the cold produced by the evaporation of water is measured, renders an accurate 

 theory of the result peculiarly desirable. The experimenter would do well to 

 consult Mr. Dalton's views on the theory of hygrometry, contained in his Meteo- 

 rological Essays, and in the Manchester Transactions ; and to examine the inves- 

 tigations of Professor Leslie, (Relations of Heat and Moisture, and Supple- 

 ment to the Encyclopaedia Britannica, article Meteorology ;) of Dr. Anderson 

 (Edinburgh Encyclopaedia, article Hygrometer,) and of M. Gay Lussac, (Biot, 

 Traite de Physique, Tom. II.) A good series of observations at high tempera- 

 tures will be found recorded in Nos. II. and III. of a Calcutta Journal, entitled 

 Gleaniugs in Sciencef. 



* The Ochterlony monument would be a favorable position for a peculiar series of 

 experiments in Calcutta. 



f Videaho Observations in the Gleanings, No. VI. pag-? 47 and 189. 



