1815.) Scientific Intelligence. 157 
Duck fat, of } 
enism GTR SAT RN BL GA ae 
Tallow weer ewer sere rreseser ee eH sreoe 28 
—— 
100. 
- Turkey fat, of 
ton Oibs 20s PRIN a oe a. eels wena 9h 
Tallow ..ccecscacccocesecccsrsesves 26 
100 
. Olive oil, of 
Greenish yellow oi] ....eseceeeeoveees G2 
Tallow (very white) ......eseeeseenves 26 
100 
_ Oil of sweet almonds, of 
SOW Oo). fa Sie say cing e wip hanes Oo 
Tallow @e@eeevevvree08 eevee eoeeeese es ee eevee 24. 
100 
Oil of colsa, of 
Yellow oil eser ev tees eeeosr ee er eees ener 54 
Tallow eseveee eevee eseeear eras eev overs 46 
—= 
100 
_ (See Annales de Chimie, March, 1815.) 
XII. Accident which happened to M. Vauquelin. 
M. Vauquelin, wishing to examine the properties of chloric acid 
lately discovered by M. Gay-Lussac, prepared a quantity of it 
according to the process of Mr. Chenevix. This process consists in 
saturating barytes with chloric acid, and evaporating to dryness. 
The saline mass is mixed with phosphate of silver, and boiled in 
water acidulated with acetic acid. Nothing remains in solution but 
chlorate of barytes, which is easily obtained in crystals. Vauquelin 
put 30 grains of these crystals into a platinum crucible, and ex- 
posed them to heat, in order to ascertain the quantity of oxygen gas 
which they contained. A violent detonation took place, and the 
crucible was broken and torn in 4 remarkable manner. Vauquelin 
found that these crystals were not pure chlorate of barytes. They 
contained likewise a mixture of acetate of barytes. To this salt the 
combustion was owing. Hence Chenevix’s method of preparing 
this salt does not answer. y Ae 
