ently or permanently to animal jellies by gradual indura- 
tion, and by mechanical compression and dilatation, 
Robertson, Abram, D. D. Direct and expeditious me- 
thods of calculating the excentric from the mean anomaly 
of a planet, - 
. — — — — — — — — — — — Demonstrations of the late Dr. 
Maskelyne’s formulae for finding the longitude and lati- 
tude of a celestial object from its right ascension and de- 
clination ; and for finding its right ascension and declina- 
tion from its longitude and latitude, the obliquity of the 
ecliptic being given in both cases, 
S 
Sal Jnglese , the name by which the sulphate of magnesia ma- 
nufactured at Monte della Guardia, is generally known in 
Italy, - 
Sap , its probable passage from the mature to the young leaves 
and fruit pointed out, . 
Suckers on the feet of different insects, described, 
Sulphate of magnesia, on the manufacture of it at Monte della 
Guardia, near Genoa, 
T 
Tadpole, on the formation of fat in the intestine of that ani- 
mal, and on the use of the yelk in the formation of the 
embryo in the egg, - 
the length. of its intestine, in proportion to the size 
of the animal, exceeds that of other animals, 
- — the reason of its unusual length of intestine pointed 
out, - 
Todd, John T., Esq. Some observations and experiments 
made on the torpedo of the Gape of Good Hope, in the 
year 1812 , 
Torpedo of the Cape of Good Hope , some observations and ex- 
periments made on it, in the year 1812 , 
— seldom met with to the eastward of the Gape of Good 
Hope, 
Torpedo of the Cape of Good Hope, the shocks received from 
it not left above the shoulder, and but seldom above the 
elbow -joint, - 
— — — — the action of its electri- 
cal organs perfectly voluntary, 
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