INDEX 
page 
Diamond , cutting , requires to be moved in a particular direc- 
tion of one of its edges, - - " 266 
. — — the singular durability of its edge accounted 
f or - - 269 
E 
Eau mcdicinale of Hus son, a specific remedy for the gout, 
— — — a description of its effects in a case of gout, 
Echineis remora , a description of the surface of that portion of 
its head, by which the animal attaches itself to the shark, 
or the bottom of ships, 
Eft, this animal does not belong to the tribe of lizards, but 
is a nearer approach to that of frogs, 
Equations, functional , on those of the second and higher 
orders involving two or more variables, 
— v— — new methods of solving those of the 
first order, and also differential equations, 
Explosive mixtures , farther experiments on their combustion 
when confined by wire-gauze, with some observations on 
flame, - 
2 57 
260 
151 
302 
197 
229 
115 
Feet, on those of animals whose progressive motion can be 
carried on in opposition to gravity, 
— farther observations on those of animals whose progres- 
sive motion can be carried on against gravity, 
Fire-damp , on that which is produced in coal mines, and on 
the methods of lighting the mines so as to prevent its 
explosion, - 
— - the great sources of it in mines are blowers, or 
fissures in the broken strata, - - - 
several specimens' of it analysed in the laboratory 
of the Royal Institution, 
— the same substance as the inflammable gas of 
marshes, - 
experiments on its combustibility and explosive 
the degree of heat required to explode it, 
— — differs in respect of combustibility from the other 
common inflammable gases, 
an endeavour to ascertain the degree of expansion 
** r* i l • i • i • 1* 
nature, 
of mixtures of fire-damp and air during their explosion, 
MDCCCXVI. 3 B 
149 
322 
6 
