138 
gical theoriesand the theory of the figure 
of the, 21; on the position of the poles 
of the, 61. 
East Indies, on a ship canal to the, 
through the Dead Sea, 97. 
Echinus lividus, on the distribution and 
habits of, 72. 
Eclipse of 1851, solar, on the red promi- 
nences seen during the total, 13. 
Edgar (Rev. John) on the neglected and 
perishing classes, and the means of 
their reformation, 115. 
Electric current, on a new effect produced 
on muscles by the, 78. 
Electricity, 2. 
Emigration and its reparative agencies in 
Treland, on the excessive, 118. 
Equations, on criteria for real and imagi- 
nary roots of biquadratic, 2. 
Eskers of the central part of Ireland, on 
the, 63. 
Ethnographical philologists, on the misap- 
plication of the terms evolution and 
development as applied by, to the in- 
flexions of a language, 82. 
Ethnology, 82; on an ethnological col- 
lection in illustration of the, of Java, ib. 
Euphrates line of communication with 
India, on the, 104. 
Fairbairn (W.) on the minie rifle, 125; 
on a new tubular boiler, #b.; on the 
tensile strength of unwrought iron- 
plates at various temperatures, id. ; on 
the mechanical properties of metals, as 
derived from repeated meltings, exhi- 
biting the maximum point of strength, 
and the causes of deterioration, 2b. 
Fair Head, onthenatural peculiarities and 
advantages of the proposed harbour of, 
129. 
Faraday (Dr.), letter from Professor Mat- 
teucci on the laws of magnetism and 
diamagnetism, 6. 
Fata Morgana of Ireland, on the, 29. 
Ferromagnetic substance, on the equili- 
brium of elongated masses of, in uniform 
and varied fields of force, 18. 
Fishes, on the structure of certain fossil, 
found in the old red sandstone of the 
north of Scotland, 55; on some, found 
at Peterhead, 78. 
Flax, New Zealand, on a new method of 
scutching the, 132. 
Flax steeps, on the development of fer- 
ment cells in the warm-water, 64. 
Fleming (Dr. Andrew) on the rocks of 
the Upper Punjaub, 43. 
Flora of the south and west of Ireland, 
on the, 64. 
INDEX II. 
Fluids, whirling, on some properties of? 
with their application in improving the 
action of blowing fans, centrifugal 
pumps, and certain kinds of turbines, 
130. 
Forbes (Prof. E.) on the fossils of the 
yellow sandstone of the South of Ire- 
land, 43; on a species of Sepiola new 
to Britain, and first procured in the 
neighbourhood of Belfast, 73 ; on a new 
map of the geological distribution of 
marine life, and on the homoiozoic 
belts, 2b. 
Fossil remains of the lower Silurians of 
the south of Scotland, on the, 48. 
Fossiliferous beds, on the, of Antrim and 
Down, 53; on the lowest, of N. Wales, 
56. 
Fossils, on the, of the yellow sandstone 
of the south of Ireland, 43; on the 
Permian, of Cultra, 53; on a few ge- 
nera of [rish Silurian, 59. 
Fowler (Dr.) on the state of the mind 
during sleep, 80. 
Galton (F.), expedition under, to the east 
of Walfisch Bay, 110. 
Galvanic battery, on the sources of heat 
generated by the, 16. 
Garrett (Robert) on improvements made 
in the harbour of Belfast, 126. 
Gartland (W.) on criteria for real and 
imaginary roots of biquadratie equa- 
tions, 2. 
Gas, on the evolution of, in Wallsend col- 
liery, 124. 
Gason (Dr. J.), climatological notes on 
Pisa and Lucca, 110. 
Geography, 95; physical, 41. 
Geological formations, on the supposed 
action of water in, 61. 
Geological structure of the counties of 
Down and Antrim, 42. 
Geologists, German, on the researches of, 
ol. 
Geology, 41; of Ireland, 47. 
Gilbart (J. W.) on the laws of the cur- 
rency in Ireland, 115. 
Giles (John V.), description of a Samoied 
family seen at Archangel, in a letter to 
Dr. Hodgkin, 84. 
Girders, on the calculation of strains in 
lattice, with practical deductions, 123. 
Gisborne and Forde (Messrs.) on a ship 
canal through the isthmus of central 
America, 110. 
Glacier moraines in Arran, on the oecur- 
rence of, 55. 
Gladstone (Thos. Murray) on malleable 
iron for beams or girders, 126, 

