326 JOH 



JOHNSON (J. R.). 



1. On the Hirudo vulgaris. Phil. Trans. CVII. p. 13. Isis, 1818, 

 V. p. 870. 



2. On the Hirudo complanata and Hirudo staynalis, now formed 

 into a distinct genus under the name Glossopora. Phil. Trans. 

 CVII. p. 339. Isis, 1818, II. p. 237. 



3. On the genus Planaria. Phil. Trans. CXII. p. 437; CXV. 

 p. 24-7 Feruss. Bull. 1823, I. p. 65 ; 1827, X. p. 424. 



4. A Treatise on the Medicinal Leech ; including a description of 

 its anatomical structure. Lond. 1816, 8. 



5. Further Observations on the Medicinal Leech, etc. Lond. 

 1825, 8. 



6. Observations on Prof. Carenas Monograph on the genus Hi- 

 rudo Journ. Roy. Inst. XXII. p. 38. Feruss. Bull. 1827, XII. 

 p. 167. 



JOHNSON (S. L.). 



1. Ascent of Mount Etna, Febr. 1832. 5i7J. Am. Journ. XXVI. 1, 

 p. 1. 



JOHNSON (Walter R,.). 



1. Notice of a Report of a Geological, Mineralogical and Topogra- 

 phical Examination of the Coal Field of Carbon Creek, etc. 

 Sill. Am. Journ. XXXIX. p. 137. 



2. Report of an Examination of the Bear Valley Coal District in 

 Dauphin County, Pennsylvania. Philad. 1841, 8. 



3. Examination and Analysis of Coal found in the Province of 

 Arauco, Coast of Chili, thirty miles south of Bio Bio River. 

 Proc. Ac. N. Sc. Philad. 1841, p. 21. 



4. On the relation between the Coal of South Wales and that of 

 some Pennsylvania Anthracites. Proc. Ac. N. Sc. Philad. 1841, 

 p. 40. 



5. Some Remarks on the recent application of Anthracite to the 

 Smelting of the Magnetic Iron Ores of New Jersey. Proc. Ac. 

 N. Sc. Philad. 1841, p. 42. 



6. Some Remarks on the Samples of Anthracite from Rhode 

 Island Proc. Ac. N. Sc. Philad. 1841, p. 118. 



7. Some Statements respecting the Fossils presented by him at the 

 last meeting of the Society. Proc. Bost. Soc. N. H. 1841, p. 43. 



8. Some Observations on the Spontaneous Combustion of Bitu- 

 minous Coal. Proc. Ac. N. Sc. Philad. 1842, p. 140. 



JOHNSTON (Alexander Keith). 



1. The Physical Atlas of Natural Phenomena, fol. Edinb. 4. 

 Edinb. 1849. 



JOHNSTON (George). 



1. On the genus Caligus of Leach. Edinb. Phil. Journ. X. p. 292. 

 Feruss. Bull. 1828, XIII. p. 160. Isis, 1832, VI. p. 603. 



2. Natural History of Molluscous Animals. Mag. Nat. Hist. ser. 1, 

 II. pp. 22, 148 ; III. pp. 39, 249, 335, 525 ; IV. pp. 351, 523 ; 

 V. pp. 31,611; VI. p. 235; VII. pp. 106, 218, 408 ; VIII. p. 71. 



