ACCOUNt OF BOOKS. 223 



lowed by Explanations of Simple Engines, called the Mecha- 

 nical Powers. Thefe are fucceeded by an Account of the 

 Effeds of Fridion, and the bell Method of applying thofc 

 Mechanical Powers?. Pradical Diredions for deiigning and 

 conftru61ing the Parts of Machines are in the next place given ; 

 and laftly, the author treats on the Strength of Machines, the 

 relative Velocity of their Parts and the leading Do6lrines which 

 are. neceffary to be attended to in (heere»5ling of Water-Mills, 

 The Machines of which Meafured Plans, Elevations and 

 Sedions are given, are; A confiderabfe number of Thraftiing 

 Machines, to be drawn eitiier by Water or by Horfes, with 

 the Elevation of a Wind-mill to turn Machinery of this De- 

 fcription; one Snuff Mill; two Sheeling Mills; feveral Corn, 

 Barley, Malt, and Flour Mills; one Oil Mill; one Flax Mill; 

 one Paper Mill; one Saw Mill; one Fulling Mill; Bleaching 

 Machines, Beetlilig Machines, and various Pumps. 



Thefe Drawings and Defcriptions will no doubt prove of 

 high value to the man of butinefs; though it is perhaps to be 

 regretted that the fame attention to junior ftudents which is 

 difplayed in the introdudory treatife, is not as fully ftiewn by 

 explaining the relative operations and eflefts of the parts of 

 thefe machines in the defcriptions which accompany the draw- 

 ings. 



Pradical Ohfervatiom concerning Sea Bathing; to zvhich are 



added, Remarks on the Ufe of the Warm Bath, % A. P. 



Buchan, M. D. of the Royal College of Phj/Jicians, London, 



Croxvn 8vo, 207 Pages. 



IN the early tlages of human fociety, when the occupa- Buchan on fea 

 tions of man led him to ftrong exercife in the open air, it is * "^* 

 probable that his health may have been chiefly impaired by the 

 fortuitous occurrences of his mode of life, and the dire6l wear 

 of his organs engaged in the grofs and adive labours of his life. 

 It is probable that he may have felt little of thofe difeafes 

 which the claffification and habits of a refined and luxurious 

 fociety have introduced. Neither mental fatigue, nor the 

 anxious and incelTant labour of crowded cities could have 

 operated upon his powers, nor was he fubjeded to the miferies 

 of indolence, repletion, and the hftlefs want of motive which 

 benumb the faculties of the rich, Thefe are the prices which 



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