TO CORRESPONDENTS. 



Communications have been received from Simplex, Mr. Nixon, and 

 Mr. Henwood, all which will meet with the earliest attention. 



Mr.WATERSTONE's Letter did not reach us until his Paper was printed; 

 it shall be inserted in our next, if agreeable to his wish. 



We have to thank Dr. Schweigger-Seidel for the Numbers for the 

 present year of his Neues Jahrbuch der Chemie imd Physik. 



A Review of Mr. Young's Elements of the Differential Calculus ; and 

 the first portion of a detailed Critical Examination of Mr. Rennie's 

 Introduction and " Plan of Study " &c. prefixed to his new Edition of 

 Montagu's Ornithological Dictionary, have been prepared : but an accu- 

 mulation of Papers, &c. requiring immediate insertion, have obliged us, 

 though with reluctance, to postpone them till our next. 



GENERAL SCIENTIFIC MEETING AT YORK. 



THE Council of the Yorkshire Philosophical Society having received 

 intimation from men of scientific eminence in various parts of the 

 kingdom, of a general wish that the friends of science should assemble at 

 York during the ensuing autumn, we are directed to announce that the 

 Society has offered the use of its apartments for the accommodation of the 

 meeting, which will commence on the 26th of September, and that arrange- 

 ments will be made for the personal convenience of those who may attend it. 

 It will greatly facilitate these arrangements if all who purpose to come to 

 the meeting would signify their intention as early as possible (by a letter, 

 post-paid) to the Secretaries. 



William Vernon Harcourt, Vice-President. 

 Wm. Gray, Jun."! o ^ • 

 John PhilLips, j Secretaries. 



Yorkshire Museum, York, July 22, 183L 



On the First of September will be Published, Price Nine Shillings in Cloth, 



ELEMENTS OF THE INTEGRAL CALCULUS ; with its Ap- 

 plications to Geometry, and to the Summation of Infinite Series, &c. 

 By J. R. YOUNG. 

 Published by J. Souter, School Tjibrary, 73 St. Paul's Churchyard. Of whom may 

 be had, lately published, by the same Author, 



2. The ELEMENTS of tlie DIFFERENTIAL CALCULUS; comprehending 

 the General Theory of Curve Surfaces and of Curves of Double Curvature, in which 

 are pointed out and corrected several important Errors that have hitherto remained 

 unnoticed in the Works of Lagiiange, Lachoix, &c. 7s. in cloth. 



3. An ELEMENTARY TREATISE ON ALGEBRA, Theoretical and Prac- 

 tical ; with attempts to simplify some of the more difficult parts of the Sciences, par- 

 ticularly the Demonstration of the Binomial Theorem, in its most general form ; the 

 Solution of Equations of the higher orders; tlie Summation of Infinite Series, &c. 8vo. 

 boards. 10s. 6d. 



4. An ELEMENTARY TREATISE on the COMPUTATION of LOGA- 

 RITHMS; intended as a Supplement to the various Books on Algebra. 12mo. 2s. 6d. 



5. ELEMENTS OF GEOMETRY ; containing a New and Universal Treatise on 

 the Doctrine of Proportions, together with Notes, in which are pointed out and cor- 

 rected several important Errors that have hitherto remained unnoticed in the writings 

 of Geometers. 8vo. 8,<-. 



6. The ELEMENTS OF ANALYTICAL GEOMETRY; comprehending 

 the Doctrine of the Conic Sections, and the general Theory of Curves and Surfaces of 

 the second order, with a variety of local Problems on Lines and Surfaces. Intended 

 for the use of Mathematical Students in Schools and Universities. 7s. cloth. 



" If works like the present be introduced generally into our schools and colleges, tlic 

 Continent will not long boast of its immense superiority over the country of Newton, in 

 every branch of modern analytical science."— r/i« Atlas, July 25, 1830. 



