ADDITIONS. 



685 



Helmholtz, H. : 



To No. 31 add reference : 

 Deutsch. Natiirf. Versamml. Bericht, 



XXXIV., 1858, pp. 225-226. 

 To No. 39 add reference : 

 Heidelberg, Vei-hand. Nat. Med. Ver. III., 



1862-63, pp. 62-67. 

 Hemerobius. See Young, (Dr.) Thomas, 



No. 26. 



Henderson, (Lieut.). On Ceylonite near Trin- 

 comalie. Ceylon, Asiat. Soc. Journ. No. 4, 

 1849, pp. 89-90. 



Henderson, Andrew. 4. On the speed and other 

 properties of ocean steamers, and on the 

 measurement of ships for tonnage. Civ. Eng. 

 lustit. Proc. XIII., 1853-54, pp. 1-30. 

 Henderson, James. On the methods generally 

 adopted in Cornwall in dressing tin and copper 

 ores. Civ. Eng. Instit. Proc. XVII., 1857-58, 

 pp. 195-212. 



Henderson, R. On the general existence of 

 iodine in spring-water. Phil. Mag. VII., 1830, 

 pp. 10-12. 



Henderson, Thomas. 53. Occultation of Uranus, 

 observed at the Cape of Good Hope, 4 Oct. 

 1832. Astron. Soc. Mem. VI., 1833, p. 187. 

 Henke, If. 17. Verhalten des Phosphorchlorids 

 zu Amiden, und Verbindungen der sogenannten 

 Nitrile mit Chloriden. Erdm. Journ. Prak. 

 Chern. LXXV., 1858, pp. 202-205. 

 Henneberg, PF., und F. Stohman. 

 Add reference : 



Erdm. Journ. Prak. Chem. LXXVI., 1859, 

 pp. 14-15. 



Henkenius, . Versuchc zur Darstellung des 



Piperins. Mag. fur Pharm. XIII., 1826, pp. 

 59-60. 



Henley, William. A description of an electro- 

 ma^netic machine. [1839.] London, Electr. 

 Soc. Proc. 1837-40, p. 183. 



Henon, J. L. 15. Sur trois varietes de Narcisse 

 (N. albus, Herbert; N. stellaris, Hnrworth (=N. 

 radiatus, Salisb.), N.radiiflorus, Knch,(Fl. Germ. 

 pi. 364) ; et une forme (inedite) intermediairc 

 entre le N. poeticus et le N. biflorus. Lyon, 

 Mem. Acad. Sci. XIIL, 1863 (Travaux), pp. 

 37-38. 



To No. 14 add reference : 

 Lyon, Mem. Acad. Sci. XIIL, 1863, pp. 



"177-184. 



Heurici, Friedrich Christoph : 

 To No. 15 add reference : 

 Majocchi, Ann. Fis. Chim. XIX., 1845, p. 



135. 



Henry, (Dr.). Etude de la theorie de la grele et 

 des trombes, suivie de considerations sur la 

 nature des taches du Soleil. Aube, Mem. Soc. 

 Agric. XXVIL, 1863, pp. 39-228. 



Henry, Noel Etienne : 



To No. 26 add reference : 

 Mag. fur Pharm. IV., 1823, pp. 312- 



322. 



Henry, J. On Mr. MDKPHV'S proof of the exis- 

 tence of a real or imaginary root for any pro- 

 posed equation. Phil. Mag.' III., 1833, p. 417. 

 Henry, Joseph : 



To No. 12 add reference: 

 Majocchi, Ann. 'Fis. Chim. VII., 1842, pp. 



165-177. 



To No. 22 add reference : 

 Majocchi, Ann. Fis. Chim. XXV., 1847, 



pp. 46-49. 



Henry, Ossiart. 1OO. Note sur 1'eau minerals et 

 la roche iodobromees de Saxon, canton de Valais, 

 Suisse. [1859.] Paris, Soc. Chim. Bull. 1860, 

 pp. 107-108. 

 Henry, Peter: 



Add reference : 



Scherer, Journ. Chemie, II., 1799, pp. 



636-642. 

 Henry, Thomas H. 6. On the White Blende of 



New Jersey. Phil. Mag. L, 1851, p. 23. 

 7. On a new compound of gold and mer- 

 cury. Phil. Mag. IX., 1855, pp. 458-459. 



8. On the separation of nickel and cobalt 



from manganese. Phil. Mag. XVI., 1858, pp. 

 196-197. 



Henry, William Charles : 

 To No. 4 add reference : 

 Bibl. Univ. LIX., 1835, pp. 76-87, 166- 

 177. 



Hensel, Keinliold. 13. Ueber den Paraguaythee 

 oder Matte. Berlin, Zeitschr. Acclimat. L, 

 1863, pp. 116-122. 



Henwood, JfilliainJory. 56. On some meteoro- 

 logical phenomena observed in the Mount's Bay, 

 Cornwall. Phil. Mag. IV., 1834, pp. 103- 

 104. 



Heppel, John Mortimer. On the relation be- 

 tween the velocity and the resistance en- 

 countered by bodies moving in fluids. Civ. 

 Eng. Instit. Proc. V., 1846, pp. 266-271. 



2. On the expansive action of steam. 



Civ. Eng. Instit. Proc. VI., 1847, pp. 316- 

 336. 



3. On the relative proportions of the top, 



bottom, and middle webs of iron girders and 

 tubes. Civ. Eng. Instit. Proc. XV., 1855-56, 

 pp. 155-190. 



4. On a method of computing the strains 



and deflections of continuous beams, under 

 various conditions of load. Civ. Eng. Instit. 

 Proc. XIX., 1859-60, pp. 625-643. 



5. On the closing of reclamation-banks. 



[1864.] Civ. Eng. Instit. Proc. XXIIL, 1863- 

 64, pp. 168-179. 



