requisite Jbr Meteorological Observations, ^c. 145 



end of it into a low cellar where a vertical glass syphon is at- 

 tached to it. 



Our navigators who traverse the ocean in every latitude, be- 

 sides keeping meteorological journals and taking soundings, 

 might record the variation of the needle, and examine the inten- 

 sity of magnetic attraction. 



To promote the science of meteorology, it would be most ex- 

 pedient that the various learned associations, planted in different 

 parts of the globe, should institute inquiries into the state and 

 internal motions of the higher strata of the atmosphere. As 

 the ultimate results would prove advantageous to the public, the 

 several governments, both in Europe and in America, might be 

 expected to defray the moderate expence of carrying this plan 

 into effect. Light small balloons could at times be launched 

 towards the most elevated regions, to detect, by their flight, the 

 existence and direction of currents which now escape our obser- 

 vation. Barometers, thermometers, hygrometers, and perhaps 

 aethrioscopes, in compact forms, and which should register them- 

 selves, might be sent up in the car. Observers, furnished with 

 accurate and complete instruments, could likewise be dispatched 

 occasionally to the intermediate heights in large balloons. By 

 classing the various meteorological journals, and combining 

 those ulterior facts, some new lights could not fail to be struck 

 out, which would gradually reveal that simple harmony, which 

 assuredly pervades all the apparent complication of this Univer- 

 sal Frame. 



The chief instruments here mentioned, and of the best and 

 most accurate cojistrtiction, may be purchased of Mr John Cary, 

 optician, London, and of Mr Adie in Edinburgh. 



Prices according to the style of mounting. 



Hygrometer (branched), 



Do. (portable), 



Atmometer, 

 Photometer, (portable), 



Do. (branched), 

 iEthrioscope, 



N. B. — Mr Gary manufactures the staff-thermometers, and Mr 

 Adie, Rutherford's thermometers. 



OCTOBER DECEMBER 1826. K 



