WIL] 



817 



[WIL 



[1870.] Cambridge Phil. Soc. Proc., 2, 1876, 

 pp. 197-199. 



Williams-Ellis, (Rev.) John Clough. 3. *On 

 a machine for illustrating the " parallelogram 

 of forces". [1871.] Cambridge Phil. Soc. Proc., 

 2, 1876, pp. 244-245. 



4. *On a mode of propelling vessels. 



[1871.] Cambridge Phil. Soc. Proc., 2, 1876, 

 pp. 245-248. 



5. *0n a method of transforming rotatory 



motion into rectilinear, so that the rotatory 

 motion remaining constant the rectilinear may 

 be completely controlled and made to vary as to 

 speed may be stopped or reversed at pleasure. 

 [1871.] Cambridge Phil. Soc. Proc., 2, 1876, 

 pp. 248-250. 



6. * A machine for tracing curves described 



by points of a vibrating string; namely, curves 

 of the forms 



x = a cos 



and curves of the form 



( t + a j - 6 cos ( t + (3 j , 



y = a sin i 



when a and ft are constants, or a ~ /3 a fraction 

 of t + a constant. [1872.] Cambridge Phil. Soc. 

 Proc., 2, 1876, pp. 256-260. 



7. *On methods of drawing in perspective. 

 [1872.] Cambridge Phil. Soc. Proc., 2, 1876, 

 pp. 276-280. 



8. *On the mechanical means for obtaining 



the real roots of algebraical equations. [1873.] 

 Cambridge Phil. Soc. Proc., 2, 1876, p. 317. 



9. On some models of PEAUCELLIER'S and 

 other parallel motions. [1874.] Cambridge 

 Phil. Soc. Proc., 2, 1876, pp. 334-338. 

 Williamson, Alexander William. 31. [Presi- 

 dential address before the Chem. Sci. Sect, of 

 the Brit. Assoc. at York, Sept. 1st.] The 

 growth of the atomic theory. Brit. Assoc. Rep., 

 1881, pp. 568-580; Nature, 24, 1881, pp. 413- 

 419 ; Chemical News, 44, 1881, pp. 123-129. 



32. An error in the commonly accepted 



theory of chemistry. [1881.] Nature, 25, 1882, 

 pp. 21-22. 



Williamson, Robert. On some metallic deriva- 

 tives of coumarin. Chem. Soc. Journ., 13, 1875, 

 pp. 850-856. 



Williamson, William Crawford. To reference 

 in No. 48 (Vol. 8) add Manchester, Lit. Phil. 

 Soc. Mem., 5, 1876, pp. 28-40. 



To references in No. 57 (Vol. 8) add Phil. 



Trans., 164, 1874, pp. 41-81. 

 58. On the organization of the fossil plants 

 of the coal measures. Part vi. Feras. Roy. 



R. s. xi. 



Soc. Proc., 22, 1874, pp. 248-251 ; Phil. Trans., 

 164, 1874, pp. 675-703. 



Williamson, William Crawford. 59. On the 

 structure of Stigmaria. [1874.] Manchester, 

 Lit. Phil. Soc. Proc., 14, 1875, pp. 45-50; 

 Nature, 11, 1875, pp. 136-137. 



6O. La vegetation primitive dans ses rap- 

 ports avec la selection naturelle et la theorie de 

 revolution. Revue Scientif., 8, 1875, pp. 1005- 

 1014, 1059-1068. 



61. On the organization of the fossil plants 



of the coal measures. Part vn. Myelopteris, 

 Psaronius, and Kaloxylon. Roy. Soc. Proc., 23, 

 1875, pp. 452-455; Phil. Trans., 166, 1877, pp. 

 1-25. 



62. On some fossil seeds from the lower 

 carboniferous beds of Lancashire. Brit. Assoc. 

 Rep., 1875 (Sect.), pp. 159-160. 



63. * Corrections of the nomenclature of 



the objects figured in a memoir " On some of the 

 minute objects found in the mud of the Levant" 

 &c. [1872.] Manchester, Lit. Phil. Soc. Mem., 

 5, 1876, pp. 131-137. 



64. Recent researches into the organization 

 of some of the plants of the coal measures. Brit. 

 Assoc. Rep., 1876 (Sect.), p. 98. 



65. On some of the physiological and mor- 

 phological features seen in the plants of the coal 

 measures. Brit. Assoc. Rep., 1876 (Sect.), p. 145. 



66. On the organization of the fossil plants 



of the coal measures. Part vm. Ferns (con- 

 tinued) and gymnospermous stems and seeds. 

 [1876.] Roy. Soc. Proc., 25, 1877, pp. 68-73; 

 Phil. Trans., 167, 1878, pp. 213-270; Ann. 

 Mag. Nat. Hist., 18, 1876, pp. 268-273. 



67. The Bakerian Lecture. On the organ- 

 ization of the fossil plants of the coal measures. 

 Part ix. On the latest researches into the 

 organization of the fossil plants of the British 

 coal measures, especially of the Calamites and 

 Lepidodendra. [1877.] Roy. Soc. Proc., 26, 

 1878, pp. 411-415; Phil. Trans., 169, 1879, pp. 

 319-364. 



68. On the microscopic conditions of a 



slab from the mountain limestone of Bolland. 

 Manchester, Lit. Phil. Soc. Proc., 17, 1878, pp. 

 70-74. 



69. On the supposed radiolarians and dia- 



toms of the carboniferous rocks. Brit. Assoc. 

 Rep., 1878, p. 534. 



7O. On the organization of the fossil plants 



of the coal measures. Part x. [Including an 

 examination of the supposed radiolarians of the 

 carboniferous rocks.] Roy. Soc. Proc., 28, 1879, 

 pp. 445-449; Phil. Trans., 171, 1881, pp. 493- 

 539. 



71. On the botanical affinities of the car- 

 boniferous Sigillarise. Brit. Assoc. Rep., 1879, 

 pp. 346-347. 



103 



