INDEX. 
Fairy Rings , on their causes, - - - 134 
Frog , observations on the stomach of the, - - 16 1 
Fungi, on their operation in producing fairy rings, - 1"6 
G 
Gas, carbonic acid, mode of ascertaining its purity, - 254 
, oxygene , , - -254 
, sulphurated hydrogene, , - 254 
— nitrous , , - 255 
Glass, its decomposition by electricity, - - 17 
H 
Hare , observations on the stomach of the, - - 145 
Hawk, , - - 159 
Heat , experiments on its production in the decomposition of 
bodies by electricity, - - 48 
Herschel, Willi am, L. L. D. His experiments for in- 
vestigating the cause of the coloured concentric rings, dis- 
covered by Sir Isaac Newton, between two object glasses 
laid upon one another, - - - 180 
, Observations on the nature 
of the new celestial body discovered by Dr. Olbers, and 
of the comet which was expected to appear last January, 
on its return from the Sun, - 260 
Hippopotamus, observations on the stomach of the, - 166 
Hog , observations on the stomach of the, - - 153 
Home, Everard, Esq. An account of two children born 
with cataracts in their eyes, to shew that their sight was 
obscured in very different degrees ; with experiments to 
determine the proportional knowledge of objects acquired 
by them immediately after the cataracts were removed, S5 
• , observations on the structure of the 
different cavities which constitute the stomach of the 
whale, compared with those of ruminating animals, with a 
view to ascertain the situation of the digestive organ, - 93 
, observations on the structure of the 
stomachs of different animals, with a view to elucidate the 
process of converting animal and vegetable substances into 
chyle, - - 139 
Human Stomach, observations on the, - - 156,169 
