INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1819. 
A page 
Amidine, mati&re intermediate entre la gomme et l’amidon, 52 
Amidon, observations sur sa decomposition & la tempera- 
ture atmospherique par l’action de l’air et de Peau - 29 
— — sur la gomme produite par sa fermentation spon- 
tan£e, - - 50 
- — - — — sur le changement de poids qu’il epreuve par sa 
fermentation £t l’air, - - 54 
■ — — - sur le gaz hydrogene produit par sa fermentation, 57 
Anderson, James, Capt. in the Royal Navy, some obser- 
vations on the peculiarity of the tides between Fairleigh 
and the North Foreland ; with an explanation of the 
supposed meeting of the tides near Dungeness, - 217 
Arbury Hill, operations for determining the variation in the 
length of the pendulum vibrating seconds at that 
station in the Trigonometrical Survey, - - 3/4 
— its latitude, - - 403 
B 
Babbage, Charles, Esq., on some new methods of inves- 
tigating the sums of several classes of infinite series, 249 
Brewster, David, LL. D., on the laws which regulate the 
absorption of polarised light by doubly refracting crys- 
tals, - 
11 
