CCCI. (Feb. 27, 1667-68.) WALLIS TO COLLINS. CCCII. (July 21, 1668.) WALLIS TO COLLINS. CCCIII. (Aug. 25, 1668.) WALLIS TO COLLINS. CCCIV. (Sept. 8, 1668.) WALLIS TO COLLINS. CCCV. (Sept. 10, 1668.) WALLIS TO COLLINS. CCCVI. (Sept. 26, 1668.) WALLIS TO COLLINS. Printing. Pell. Huyghens and others, quadrature of hyper- CCCVII. (Nov. 3, 1668.) WALLIS TO COLLINS. CCCVIII. (Jan. 19, 1668–69.) WALLIS TO COLLINS. CCCIX. (Jan.- .—, 1668–69.) WALLIS TO COLLINS. CCCX. (March 23, 1668-69.) WALLIS TO COLLINS. CCCXI. (June 17, 1669.) COLLINS TO WALLIS. CCCXII. (June 24, 1669.) WALLIS TO COLLINS. CCCXIII. (June 11, 1669-70.) WALLIS TO COLLINS. CCCXIV. (June 13, 1669-70.) WALLIS TO BORElli. CCCXV. (July 23, 1670.) WALLIS TO COLLINS. CCCXVI. (Aug. 4, 1670.) WALLIS TO COLLINS. CCCXVII. (March 21, 1671.) COLLINS TO WALLIS. Kersey and others on equations. Remarks on Pell..........................527 CCCXVIII. (Jan. 25, 1671-72.) WALLIS TO COLLINS. Papers of Horrocks and Crabtree. Printing in parts. New- CCCXIX. (Feb. 13, 1671-72.) WALLIS TO COLLINS. CCCXX. (March 16, 1671-72.) NOTES OF COLLINS for writing TO WALLIS AND VERNON. CCCXXI. (March 27, 1672.) WALLIS TO COLLINS. CCCXXII. (May 13, 1672.) WALLIS TO COLLINS. CCCXXIII. (June 8, 1672.) WALLIS TO COLLINS. CCCXXIV. (June 14, 1672.) WALLIS TO COLLINS. CCCXXV. (July 18, 1672.) WALLIS TO COLLINS. CCCXXVII (misprint for CCCXXVI.) (July 30, 1672.) WALLIS TO COLLINS. CCCXXVII. (Aug. 12, 1672.) COLLINS TO WALLIS. CCCXXVIII. (Aug. 15, 1672.) WALLIS TO COLLINS. CCCXXIX. (Oct. 26, 1672.) WALLIS TO COLLINS. CCCXXX. (Nov. 14, 1672.) WALLIS TO COLLINS. Bernard and Apollonius. Printing of Kersey and of Hor. CCCXXXI. (March 15, 1672-73.) WALLIS TO COLLINS. Letter from Schooten concerning Hudde. Perkes's dialling 555 CCCXXXII. (March 27, 1673.) COLLINS TO Wallis. CCCXXXIII. (March 29, 1673.) WALLIS TO COLLINS. Acknowledgments. Remarks on cubic equations. and Vlacq. Biquadratics Briggs .560 CCCXXXIV. (April 8, 1673.) WALLIS TO COLLINS. Further remarks on equations: account of what he gave in 1648....... CCCXXXV. (April 12, 1673.) WALLIS TO COLLINS. .564 The last continued. Wallis's account of his early researches in equations.... CCCXXXVI. (May 6, 1673.) WALLIS TO COLLINS. .576 Explanation on cubic equations. Negative plane. Old difficulty in notation. Geometrical explanation of imaginary root ..580 CCCXXXVII. (Sept. 27, 1673.) WALLIS TO COLLINS. Commissions. Explanations on equations. Enquiry about the date of Neale's quadrature .586 CCCXXXVIII. (No date.) COLLINS TO WALLIS. Barrow's Archimedes, and other notes ..587 CCCXXXIX. (Aug. 24, 1674.) WALLIS TO COLLINS. Books received. Gregory. Criticism on Anderson. Barrow's Archimedes. Pappus ..589 CCCXL. (Sept. 1, 1676.) WALLIS TO COLLINS. Continued fractions applied to the circle .590 CCCXLI. (Sept. 11, 1676.) WALLIS TO COLLINS. The English* of the next .591 • It is evident that Wallis intends the Latin copy for Tschirnhaus; and writes the English one because he is not sure of Collins's Latin power. 644 CONTENTS OF THE SECOND VOLUME. CCCXLII. (Sept. 11, 1676.) WALLIS TO COLLINS. Examination of a letter sent by Tschirnhaus on equations. Quadrature of circle by continued products and frac tions.. .597 CCCXLIII. (Sept. 16, 1676.) WALLIS TO COLLINS. Continuation of the last. English postscript. Will be glad to have Newton's letter "having a very good esteem of the person, though no acquaintance with him" CCCXLIV. (No date.) WALLIS TO COLLINS. .600 Examples of cubic expressions with constant third differences in their last terms CCCXLV. (Feb. 22, 1676–77.) WALLIS TO COLLINS. .604 Book concerning Leibnitz. Intentions of publication. Thanks to Flamsteed for translating. French algebra CCCXLVI. (April, 1677.) WALLIS TO COLLINS. ...606 Contents of a packet sent for press: among them the discourse on algebra ..607 CCCXLVII. (Oct. 8, 1677.) WALLIS TO COLLINS. Descartes. Tschirnhaus. Newton. Emendations at press. Neale. Is still of opinion that Mr. Newton should perfect his notions, and print them suddenly. |