56 Notices respecting New Booh. 



one common ruin, more dreadful to contemplate than their 

 widest dispersion." 



Section VIII treats of the stiffness of Beams, to resist la- 

 teral Strains, with its application to some interesting practical 

 cases. 



Section IX is on the strength and stiffness of Beams, to 

 resist Tortion or Twisting, with its application to machinery. 



Section X treats of the strength of Columns, Pillars and 

 Ties, with several new Examples. What Euler, Lagrange, 

 and other continental mathematicians obtained, from the most 

 refined methods of analysis, is here arrived at and exceeded in 

 accuracy, simplicity and adaption to use. 



Section XI has been spoken of (as the 7th) in our account 

 of the 1st Edition, before referred to. 



The Table of Data will be found considerably improved. 

 And at the end is a very copious alphabetical Index, which 

 will serve to direct the unlearned or the casual consulter of 

 this useful volume to the particular Table, Example in num- 

 bers, Rule in words at length, or algebraical Formula or Equa- 

 tion, adapted to any required case; calling at the same time 

 his attention to the other cases and conditions, of the same 

 or some nearly similar Problem, from which, the one in 

 hand must be carefully distinguished, in order to avoid error, 

 by the application of a wrong Rule. We deem every Book, 

 materially defective, which appears without a good alpha- 

 betical Index. 



We are glad to observe, at the end of the Preface, that a 

 second Volume or Part of this Work on Cast-iron and other 

 Materials, is in preparation, treating on the strength of Pipes, 

 Mains, Tanks, Boilers, &c. : of Chains to resist impulsion 

 and pressure : of Suspension and other Iron Bridges : and of 

 framed work for Roofs, Bridges, Mills, and Machinery. 



At the end of this Volume, we observe also, that Mr. 

 Tredgold has in advanced progress, " Principles of Warming 

 and Ventilating Public Buildings, Dwelling Houses, Manu- 

 factories, Hospitals, Stores, Conservatories, &c, and of con- 

 structing Fire-places, Boilers, Steam Apparatus, Grates, 

 Drying Rooms," &c. 



A Synopsis of the Prices of Wheat and of Circumstances af- 

 fecting them; particidarly of the Statutes 'which relate to it 

 from the Commencement of the Thirteenth Century to the End 

 of 1822: Exhibiting in one view the Market Prices as they 

 occurred and as expressed in the present Value of Money. 

 Together with Statements which indicate the Situation of the 



Country 



