taken into, and qf'tlie Sec returns from^ tlie Human Body, C9 



Upon the whole we may observe, that of ihe 6 lbs. of aliment 

 taken in a day, there appears to be nearly 1 lb. of carbon and 

 azote together ; the remaining 5 lbs. are chiefly water, which 

 seems necessary as a vehicle to introduce the other two elements 

 into the circulation, and also to supply the lungs and other mem- 

 branes with moisture. Very nearly the whole quantity of food 

 enters into the circulation ; for the faeces constitute only one- 

 eighteenth part, and of these a part, bile, must have been se- 

 creted ; one great portion is thrown off by means of the kidneys, 

 namely about half of the whole weight taken, but probably more 

 or less according to climate and season, &c. ; another great por- 

 tion is thrown off by means of insensible perspiration, this last 

 may be subdivided into two portions, one of which goes off by 

 the skin, amounting to one-sixth part, and the other five-sixths 

 are discharged from the lungs in carbonic acid, and in water or 

 aqueous vapour. 



Such are the deductions I have drawn from my early experi- 

 ments, and from the light which modern chemistry has diffused 

 over the animal and vegetable products. This branch of science 

 belongs more peculiarly to the physician. What the profession 

 may have done in it of late years, I am not aware, my studies 

 not having been in that line. But it must be allowed to be a 

 subject worthy the attention of professional characters, and not 

 uninteresting as a branch of physics. — Memoirs of the Man- 

 chester Philosophical Society^ Second Series, vol. v. 



Barometric Measurement of the Height of Cheviot. By Lieu- 

 tenant-Gen. Sir Thomas Makdougall Brisbane, K.C. B., 

 President of the Royal Society of Edinburgh, LL.D. &c., 

 and Mr William Galbraith, Oxon., A. M. 



JT ROM repeated measurements of altitudes by the barometer, 

 carefully performed, various important consequences may be 

 deduced relative to the expansion of air, affected with tempera- 

 ture and different degrees of moisture. By the same means the 

 decrements of heat, in proportion to the height, of which the 

 law is not yet probably so well determined as might be desirable, 

 will also be determined. With these views, it was agreed hy 

 the observers just named, to make a series of observations at 



