ACADEMY OF SCIENCES.] MATHEMATICS. 57 



27. Remarks on the doctrine of limits. 



Analyst, Des Moines, Iowa, vol. 9 (July, 1882): 114-115. 



28. (1) The teaching of mathematics, Elementary Mathematics; (2) Mathematical teaching. 



Educ. Rev., New York, vol. 4 (Oct., 1892): 277-286; vol. 6 (Nov., 1893): 332-341. 



29. Modern mathematical thought. 



Bull. N. Y. Math. Soc, vol. 3 (Jan. 1S94): 95-107. 

 Also in Nature, London, vol. 49 (Feb. 1, 1894): 325. 



An address delivered before the N. Y. Mathematical Society at its annual meeting, Dec. 2S, 1893. 



29A. Italian translation — Pensiero matematico moderno. 

 Rivista di matematica (Peano), vol. 4 (1894 ): 121-134. 



30. The philosophy of hyperspace. 



Science, n. s., vol. 7 (Jan. 7, 189S): 1-7. 



Also in Sci. Amer. Snpp., vol. 45 (Feb. 12, 1898): 18450-18451. 

 Also in Bull. Amer. Math. Soc, vol. 4 (Feb. 1898): 187-195. 

 Also in Pop. Astr., vol. 6 (Sept., 1898): 380-389. 



Presidential address before the American Mathematical Society, Dec. 20, 1S97. 



31. Note [on being elected editor in chief]. 



Amer. Jl. Math., vol. 20 (April, 1899). 



32. Professor Thomas Craig, Ph. D. [Died May 8, 1900]. 



Amer. Jl. Math., vol. 22 (1900), one unnumbered page. 



Appended to the sketch is the note: " The writer is indebted to Dr. L. P. Eiscnhart for part of the material on which this notice 

 is based." 



33. The fairyland of geometry. 



Harper's Mag., vol. 104 (Jan., 1902): 249-252. 



Also in: Side-lights on Astronomy (1906); see no. 300 of Section II. 



34. An account of Professor Runkle's Mathematical Monthly. 



Amer. Math. Mo., Springfield, Mo., vol. 10 (May, 1903): 130-133. 



35. Methods of teaching arithmetic. 



Educ. Rev., New York, vol. 31 (Apr., 1906): 339-350. 

 Also in Nat. Educ. Assoc. Proc. (1906;: 686-99. 



