WIL] 



377 



[WIL 



Williams, (Rev.} David. 16. On the stratified 

 and unstratified volcanic products of the West of 

 England. Brit. Assoc. Rep. 1842 (pt. 2), pp. 

 54-55. 



17. On the discovery of the remains of 



fishes at the base of the mountain limestone in 

 the vicinity of Bristol. Brit. Assoc. Rep. 1842 

 (pt. 2), pp. 60-61. 



18. Plausible reasons and positive proofs, 



showing that no portion of the " Devonian 

 System " can be of the age of the Old Red Sand- 

 stone. Phil. Mag. XX., 1842, pp. 117-135. 



19. On the true position in the " Devonian 



System" of the Cornish Killas. Phil. Mag. 

 XXL, 1842, pp. 25-29. 



20. On the granite and other volcanic rocks 



of Lundy Island. Brit. Assoc. Rep. 1843 (pt. 2), 

 p. 57. 



21. On the Exeter amygdaloid. Brit. 



Assoc. Rep. 1844 (pt. 2), pp. 55-56. 



22. On the Killas group of Cornwall and 



South Devon ; its relations to the subordinate 

 formations in Central and North Devon and 

 West Somerset ; its natural subdivisions ; and 

 its true position in the scale of British strata. 

 Phil. Mag. XXIV., 1844, pp. 332-346 ; Corn- 

 wall, Geol. Soc. Trans. VI., 1846, pp. 122- 

 138. 



23. On the trap-rock of Bleadon Hill, in 



Somersetshire. Geol. Soc. Journ. I., 1845, pp. 

 47-51. 



24. On the origin of the gypseous and 



saliferous marls of the New Red Sandstone. 

 Geol. Soc. Journ. I., 1845, pp. 148-151. 



25. On granite veins. Cornwall, Geol. 



Soc. Trans. VI., 1846, pp. 64-67. 



26. On an important slate term in the 



Killas series of Cornwall and South Devon, not 

 sufficiently adverted to in my former classifica- 

 tion of that group in 1843; with additional proofs 

 in confirmation of the true geological position 

 of the Ocrynian or Devonian System. Corn- 

 wall, Geol. Soc. Trans. VI., 1846, pp. 334-347. 



27. On the circumstances and phenomena 



presented by the granite of Lundy Island and 

 of Hester combe in the Quantock Hills, compared 

 with those which characterise the granites of 

 Devon and Cornwall. Geol. Soc. Journ. II., 

 1846, pp. 68-70. 



28. On the several volcanic interferences, 



which alternate and are concurrent with and 

 eventually supersede, the depositions of the old 

 red sandstone of the British Isles. [1848.] 

 Cornwall, Geol. Soc. Trans. VII., 1847-60, pp. 

 65-68 ; Edinb. New Phil. Journ. XLVL, 1849, 

 pp. 361-365. 



29. Supplemental notice on the geology of 



Lundy Island. Brit. Assoc. Rep. 1848 (pt. 2). 

 p. 79. 



VOL. VI. 



Williams, (Rev.} David. 30. On an original broad 

 sheet of granite, inters tratified among slates with 

 grit beds, between Falmouth and Truro in Corn- 

 wall. Brit. Assoc. Rep. 1849 (pt. 2), p. 68. 



31. Cliff section of Lundy Island, from the 



Sugar-loaf to the Devil's Limekiln. Phil. Mag. 

 XXXV., 1849, pp. 28-34. 



Williams, (Major) Edward. Experiments on 

 the expansive force of freezing water. [1786.] 

 Edinb. Roy. Soc. Trans. II., 1790, pp. 23-28. 



Williams, George. Total eclipse of the Sun, 28 

 July 1851, observed at Trollhattan. Astron. 

 Soc. Mem. XXL, 1852, pp. 50-54; Liverpool, 

 Lit. Phil. Soc. Proc. VII., 1854, pp. 4-6. 



Williams, J. Observations on the falls of the 

 Ohio. Amer. Med. Phil. Reg. I., 1810, pp. 330- 

 336. 



2. On the height of the mountains in Vir- 

 ginia and New York, with observations on the 

 formation of rivers. Amer. Med. Phil. Reg. 

 I., 1810, pp. 336-346. 



Williams, John. On the cure of persons bitten 

 by snakes. Asiatick Researches, II., 1790, pp. 

 323-329; Tilloch, Phil. Mag. IV., 1799, pp. 

 191-196. 



Williams, John (jun.). Account of some re- 

 markable disturbances in the veins of the mine 

 called Huel Pasver in Cornwall. [1815.] Geol. 

 Soc. Trans. IV., 1817, pp. 139-145. 



Williams, John. Account of two thunder storms 

 which happened in Worcestershire, in which it 

 appeared that the electrical discharge passed 

 from the earth towards the clouds. Edinb. 

 Journ. Sci. X., 1829, pp. 81-86. 



2. On the probable cause of the Russet in 



Apples. [1828.] Hortic. Soc. Trans. VII., 

 1830, pp. 505-507. 



3. On the electricity of steam. Phil. 



Mag. XVIII., 1841, pp. 93-94. 



Williams, John. On the occurrence of parasitic 



Rotifera in Volvox globator. [1850.] Microsc. 



Soc. Trans. III., 1852, pp. 129-131. 

 Williams, John. On the use of benzole in the 



preparation of vegetable alkaloids. Chemist, 



I., 1854, pp. 142-145. 



2. On pyrogallic acid. [1854.] Photogr. 



Soc. Journ. II., 1856, pp. 82-84. 



3. On the preparation of Ecbaline, the 



active principle of Ecbalium officinarum. 

 Chemical News, I., 1860, pp. 124-125. 



Williams, John. Notes on Chinese astronomy. 

 Astron. Soc. Month. Not. XV., 1854-55, pp. 

 19-23. 



2. On an eclipse of the Sun recorded in 



the Chinese annals as baring occurred at a very 

 early period of their history. Astron. Soc. 

 Month. Not. XXIIL, 1863, pp. 238-242. 



3 B 



