194 
GENERAL INDEX 
stones, and t heir relations to the meta- 
morphic and Silurian rocks of the 
county of Tyrone, 70 ; observations 
upon the Permian group of the N.W. 
of England, 83 
Harkness (Prof. R.) on the lower Silu¬ 
rian rocks of the S.E. of Cumberland 
and the N.E of Westmoreland, 1864, 53 
-on the geology of the Lake country, 
1865, 57 ; on the Silurian rocks of the 
Isle of Man, 58 ; on the metamorphic 
rocks and serpentine marbles of Conne¬ 
mara and Joyce’s country, 59 
-Address to the Geological Section, 
1869, 82 
- on the importance of completing, 
without delay , the valuable investigation 
into the composition and geological dis- 
tribution of the hcematite iron ores of 
Great Britain and Ireland , 1870, 9 
- on cutting and preparing sections of 
Mountain-lunestone corals, 1869, 171 ; 
1870 , 41 ; 1871, 165 ; 1872, 241 ; 1873 ,479 
-on the discovery of a kitchen-midden 
at Ballycotton, in co. Cork, 1870, 150 
* -one of the earliest forms of Trilo- 
bites exhibited by, 1871, 100 
- on the structure and classification of 
the Labyrinthodonts, 1873, 225 ; 1874, 
149 
-- on erratic blocks or boulders , 1873, 
188 ; 1874, 192 ; 1875 , 82 ; 1876, no; 
1877, 81 ; 1878, 185 
- on fossils from North-western Scot¬ 
land, 1873, 412 ; 1878, 130 
-on the occurrence of faults in the 
Permian rocks of the lower portion of 
the Yale of Eden, Cumberland, 1873, 81 
* -sketch of the geology of the N.E. 
of Ireland, 1874, 83 
- on the circulation of underground 
waters, 1875, 114 ; 1876, 95 ; 1877, 56 
-and Dr. H. A. Nicholson on the 
Coniston group of the Lake-district, 
1867, 61 
- and Dr. H. A. Nicholson on the 
green slates and porphyries of the Lake- 
district, 1870. 74 
* -and Prof. H A. Nicholson on the 
strata and fossils between the Borrow- 
daile series of the Coniston flags of the 
north of England, 1876, 90 
-(W.), preliminary notice on a new 
method of testing samples of wood- 
naphtha, 1871, 72 
Harland (E. J.) on a new form of 
screw-lowering apparatus, 1874, 222 
-(T.) on the desirability of establishing 
a ‘ close time ’ for the preservation of 
indigenous animals, 1873, 346 ; 1874, 
264 ; 1875, 184 ; 1876, 63 
Harlech Mountains, Merionethshire some 
pre-Cambrian rocks in the, Dr. H. 
Hicks on, 1880, 584 
Harley (Dr. G.) on Schonbein’s ant- 
ozone, 1862, 44 ; on secret poisoning, 
129 
-on the poisoned arrows of savage 
man, 1864, 144 
-on the mode of formation of renal 
calculi, 1873, 130 
* -on the biliary concretions, demon¬ 
strating a uniformity in the construc¬ 
tion of concretions in the animal, 
vegetable, and mineral kingdoms, 1884, 
7 8 3 
-(Rev. R.)on a certain class of linear 
differential equations, 1862, 4 
-on the theory of differential resol¬ 
vents, 1865,6; 1873, 17 
-on differential resolvents, 1866, 2 ; 
on Tschirnhausen’s method of trans¬ 
formation of algebraic equations, and 
some of its modern extensions, ib. ; 
on Boole’s mathematical analysis of 
logic, 3 
* - on finite solutions of algebraical 
equations, 1867, 4 
-on a certain cyclical symbol, 1867, 4 
-on Boole’s ‘ Laws of Thought,’ 1870, 
14 
- on lunar objects suspected of change , 
1872, 245 
- on science lectures and organisation , 
1873, 495 , 507 
-*on Prof. Evans’s method of solving 
cubic and other trinomial equations, 
1873, 22 
-f on the Stanhope * demonstrator ’ or 
logical machine, 1878, 442 ; on certain 
linear differential equations, 466 
-a contribution to the history of the 
algebra of logic, 1881, 559 ; * on differ¬ 
ential resolvents, 565 
- on the explicit form of the complete 
cubic differential resolvent, 1886, 439 
-on the umbral notation, 1887, 600 ; 
complete integral of the n- ic differ¬ 
ential resolvent, 606 
Harmer (F. W.) on some thermal springs 
in the fens of Cambridgeshire, 1870, 74 
- and Searles V. Wood, jun., on the 
Glacial and Postglacial structure of 
Norfolk and Suffolk, 1868, 80 
-and S. Y. Wood on the paleonto¬ 
logical aspects of the Middle Glacial 
formation of the East of England, and 
their bearing upon the age of the middle 
sands of Lancashire, 1870, 90 
-(S. F.) on the structure and develop¬ 
ment of Loxosoma, 1884. 779 
* -on Cephalodiscus, 1887, 759 
-discussion on coral reefs, 1888, 721 
- on the steps taken for investigating 
the natural history of the Friendly 
Islands, or other groups in the Pacific 
visited by H.M.S. ‘ Egeriaj 1889, 113 
- on the occupation of a table at the 
