go SCIENTIFIC NEWS. 



reduced the theory of tlie tides to a simple form : inves- 

 tigated the cohesion and capillary action of fluids, in which 

 he has anticipated Laplace: made various comparative ex- 

 periments on the elasticity of steam, evaporation, iMO(^:,the 

 indicatioais of hygrometers : and interspersed much practical 

 information of various kinds, with new inventions and con- 

 trivances, that would take up too much room to enumerate. 

 The 'Jd vol. commences with the mathematical elements 

 of natural philosophy, comprehending every proposition re- 

 quired for forming a complete series of demonstrations, lead- 

 ing to ever}^ case of importance that occurs in the science, 

 except some of the more intricate calculations of astronomy. 

 But the greater part of it is occupied by what many will con- 

 sider as not the least important of the whole, a catalogue of 

 works relating to natural philosophy and the arts, metho- 

 dically subdivided as far as could be done with convenience 

 and accuracy. In this catalogue, works of superior merit 

 and accuracy are distinguished by asterisks, and those the 

 author considered as erroneous or unimportant by obelisks : 

 beside which he has pointed out those he has quoted ; and, 

 for the convenience of those who have access to the libraries 

 of the Royal Institution, Royal Society, Sir J. Banks, and 

 the British Museum, the books to be found in them* 

 Extracts to, and remarks, for the most part brief, are fre- 

 quently given, pointing out the leading objects, or affording 

 hints for farther investigation. In fact, such a body of in- 

 formation, and such a copious list of references to original 

 sources, condensed into a compass comparatively so small, 

 will not easily be found among the modern productions of 

 our press. 



Lectures on CJicmlstnj. 



Mr. ACCUM'S lectures on operative chemistry and mi- 

 neralogy, exhibiting a summarj^ exposition of the processes 

 of experimental chemistry, and general practical rules to be 

 observed in the performance of chemical experiments; to-> 

 gether with a summary view of analytical mineralogy, exem-e 

 plifying the practical analysis of minerals; will commence 

 October 1st. 



